Choosing the right CCTV camera system means matching three things to your space: camera type, resolution, and storage. Browse EERNA's full security systems range as you read, then use the breakdown below to match a setup to your actual risk.
Camera Type and Connectivity
Wired (DVR/NVR): Steadier recording with no dropped connections, best for a permanent shop setup.
Wireless/WiFi: Flexible placement and a quick DIY install, best for a small home.
Dome, bullet, or turret: Dome for discreet indoor coverage, bullet for visible outdoor deterrence, turret for outdoor corners with tricky light.
Resolution and Night Vision
2MP (1080p): Enough for general home monitoring, confirming who came to the door.
4 to 5MP: Needed for face recognition, plate reading, and shop dispute evidence.
Night vision range: Look for at least 10 to 30m of IR coverage, or full-color night vision if you need to identify colors after dark.
Storage and Trusted Brands
Local storage: A DVR, NVR, or XVR keeps footage on-site with no ongoing subscription.
Cloud backup: Lets you check footage remotely, available on most IP camera setups.
Reliable brands: Hikvision, Dahua, Uniview, and TP-Link all sell dependable gear in Bangladesh, with local pricing and support.
Most people buy CCTV based on price or megapixels alone, without checking if it actually fits their space.
That's how you end up with a camera pointed at the wrong angle, a hard drive that fills up in a week, or a system that goes dark the moment load-shedding hits, right when you needed the footage most.
This guide fixes that. It walks through each decision, camera type, resolution, connection, and storage, with real Bangladesh pricing, so you buy the right system the first time.
Do You Actually Need a CCTV System?
If you have noticed stock going missing, staff disputes over cash, or a break-in nearby, the answer is yes. A single visible camera at your entrance cuts attempted theft, simply because people avoid places that are watching.
Signs It's Time to Install One
Consider CCTV if any of these sound familiar:
Repeated stock shrinkage or unexplained inventory loss
Staff accountability gaps, like cash disputes or missing items
Insurance requirements, or a chance to lower your premium
A recent break-in or theft reported nearby
Package theft from your veranda or gate
Wanting to check on kids, pets, or elderly family members while you're out
Even one camera at a shop entrance works as a deterrent. Thieves target places that look unwatched.
Home Security vs Shop Security: How the Priorities Differ
Homes and shops need different setups because the risks differ.
A home usually needs three to five cameras. A shop with a counter, stockroom, and multiple entry points often needs six to sixteen or more.
Budget splits differently too. Home buyers often start with a two- or three-unit package (that many cameras bundled with a DVR or NVR and cabling, sold as one set).
Shops tend to invest in four- to eight-unit packages, running from about ৳17,200 to ৳27,900.
Shops may also need footage kept for thirty days or more, for insurance or dispute purposes.
Homes usually get by with seven to fifteen days, checked through a phone app rather than a staffed NVR setup.
CC Camera vs IP Camera: Which One Fits Your Setup?
CC (analog) cameras send video through a cable to a DVR. They don't need internet, and they cost less.
IP cameras send video over Wi-Fi or an Ethernet cable to an NVR. They cost more, but you can check your camera from your phone, anywhere.
Pick CC if you want to save money or your internet is unreliable. Pick IP if checking your camera from your phone matters to you.
How Analog (CC) Cameras Work, and When They Make Sense
Analog cameras send video through a cable straight to a DVR box. This cable can run up to 500 metres, so it works fine even in a big shop or house.
The best part is it keeps recording on its own. If your internet goes down, you don't lose your footage. It just keeps saving to the DVR like normal.
It's also the cheaper option. A Uniview camera in this style costs around ৳1,650 to ৳1,700. That makes it a smart pick if you're watching your budget, or if your internet connection isn't reliable.
One thing to know: you can't check the footage from your phone unless you add extra equipment. And it won't recognize faces on its own. But if you just want solid, reliable recording without spending a lot, this does the job well.
How IP Cameras Work, and When the Extra Cost Is Worth It
IP cameras send video over a cable (called Ethernet) or WiFi to an NVR. This matters to you for one big reason: you can check your shop or home from your phone, no matter where you are.
Setup is easy too. Most IP cameras use one single cable for both power and video. No messy wiring.
The picture quality is sharp, usually 3 to 5MP, with 4K on higher-end models. That means you can actually see faces clearly, not just blurry shapes. Some cameras also send an alert to your phone the moment they spot movement, so you know something happened right away.
A TP-Link VIGI C420I 2MP turret IP camera costs ৳2,350. A sharper 4MP model that also shows color at night costs up to ৳4,700. Browse EERNA's full IP camera range or the TP-Link lineup to compare options.
Quick Comparison: Cabling, Cost, Remote Access, Storage
Check your camera and connection type against your budget in one glance before you decide.
Types of CCTV Cameras and Where Each One Belongs
Every camera shape is built for a different job. Here's which one fits where.
Dome Cameras: Indoor, Discreet, Shop Floors and Living Rooms
Dome cameras mount on the ceiling, cover a wide angle, and resist tampering. The housing hides which direction the lens points, which makes them harder to avoid.
They work well for retail counters, living rooms and hallways, and offices or waiting areas. The TP-Link VIGI C240I 4MP dome IP camera costs ৳4,200, comes with PoE, and carries an IP67 weatherproof rating.
Bullet Cameras: Outdoor Entrances, Gates, Warehouses
Bullet cameras are cylindrical, weatherproof, and built to be seen. That visibility matters: around 60% of burglars avoid properties with visible cameras.
They fit best at main gates, driveways, shop entrances, warehouse perimeters, and long-range spots needing 30 to 50 metres of infrared coverage. A Uniview 4MP mini bullet camera costs ৳6,000, with a 50m IR range and IP67 rating.
Turret Cameras: The Outdoor Alternative to Bullet
Turret (or eyeball) cameras use a ball-and-socket mount, so you can angle them precisely. They also handle low light better than domes, with less glare from headlights or streetlights.
Good spots include verandas, semi-outdoor areas, and corners with changing light. The TP-Link VIGI C420I 2MP turret costs ৳2,500, and the C440I 4MP turret costs ৳3,350.
PTZ Cameras: Large Shops, Warehouses, Active Monitoring
PTZ (Pan-Tilt-Zoom) cameras let you control direction and zoom remotely, suiting large warehouses, parking lots, and public areas that need one camera to scan several zones.
They cost more, from ৳33,000 to ৳45,000 and up, and moving parts wear down faster than a fixed camera. Reserve them for high-end retail where active monitoring genuinely pays off.
Camera Type Comparison (BDT Pricing)
This table puts all four camera types side by side, so you can compare price against what each one is actually good for before you buy.
How Many Cameras Do You Actually Need?
A good rule is one camera for every 15 to 20 square metres. But don't stop there. Where you place the camera matters more than how many you buy.
Two cameras in the right spots can catch a thief. Four cameras in the wrong spots can miss him completely.
Point your cameras at the door and the counter first. That's where trouble actually happens.
The Coverage-Area Rule of Thumb, and Its Limits
The 15 to 20 square metre rule is just a rough starting point. It works for a simple square room. Most shops and homes are not simple squares.
So don't just count square metres and add cameras. Think about what you're trying to protect first.
Put your cameras where they matter most: the entrance, the cash counter, and the stockroom. These are the spots where theft actually happens.
Where you place a camera matters more than how many you buy.
Worked Example: A Typical Small BD Shop
Picture a 200 to 300 square foot grocery or electronics shop, with a street-facing entrance, a counter, and a small stockroom. This setup covers the essentials:
Bullet camera at the entrance, for deterrence(scares off thieves before they try anything) and face capture (Hikvision 2MP, ৳2,580).
Dome camera over the cash counter, for discreet dispute evidence
Turret or dome covering the stockroom and back aisle (Uniview 2MP analog).
Optional fourth camera for a side entrance or high-shelf blind spot.
Camera cost alone runs ৳9,000 to ৳12,000. A full four-unit package with DVR, hard drive, and cabling starts at ৳17,200 through EERNA's CC camera package range.
Worked Example: A Typical Home
For an urban Bangladesh home with a main gate, a veranda, and one living room entry, this setup covers the key risk areas:
Bullet camera at the main gate, for deterrence and visitor ID (৳2,580–৳5,900).
Turret or dome on the veranda, for weather resistance and low light (৳2,350–৳3,350).
Dome in the living room or main hallway, for family monitoring (৳3,450–৳4,700).
Camera cost runs ৳8,000 to ৳14,000. Three-unit packages including a DVR start at ৳15,000.
DVR, NVR, or XVR: Choosing Your Recording System
DVR, NVR, and XVR all do the same basic job: they store your camera footage so you can look back at it later.
The difference is which type of camera each one works with, and how much it costs you upfront.
DVR: Budget-Friendly, Works With Analog Cameras
DVR is the box that saves your camera footage. It works with older-style cameras and doesn't need the internet to record, so it keeps working even if your Wi-Fi goes down. It's also the cheaper option.
A bundle with two to eight cameras, plus the DVR itself, costs between ৳12,400 and ৳27,900.
These older-style cameras connect using a coaxial cable. Think of it as a simple wire that carries the video picture straight from the camera to the DVR box, nothing fancy, just a direct line.
That's part of why this setup costs less: the cable and the tech behind it are older and simpler than what newer cameras use.
Choose a DVR when cost and simplicity matter more than remote access.
NVR: Built for IP Cameras, Better Remote Access
An NVR is the recorder that works with IP cameras. It connects over Ethernet or WiFi, and with PoE, one cable handles both power and data, so there's less wiring to deal with.
The big benefit here is remote access. You can check your cameras from your phone, back up footage to the cloud, and use smart features like motion alerts.
A Hikvision three-unit IP package with NVR and a 1TB hard drive costs ৳23,400. Just remember, you'll need an internet connection to actually view footage remotely. Browse EERNA's NVR range or the Hikvision 5-unit IP camera package for a ready-made setup.
XVR: Hybrid Support for Mixed Camera Setups
XVRs (Extended Video Recorders) support both analog and IP cameras in one unit, without needing a separate converter. This makes an XVR the practical choice for adding IP cameras to an existing analog system.
Dahua's 4 to 16 channel XVR packages range from ৳17,200 to ৳46,900, including hard drive and cables. Think of it as the future-proof, hybrid option between DVR and NVR.
How Much Storage You Actually Need
Storage scales with resolution, frame rate, and how long you keep footage.
A 2MP camera uses roughly 21.6 GB a day, or about 0.65 TB over thirty days. A 5MP camera uses about 54 GB a day, or 1.62 TB over thirty days.
For shops, plan on a 2 to 4TB hard drive for thirty-day retention. Homes can usually start with 1TB and scale up later.
Resolution, Night Vision, and Field of View: What the Specs Actually Mean
Most homes only need 2MP. That's enough to confirm someone was at your door. Shops need more, 4 to 5MP, if you want to make out a face or a number plate clearly.
But megapixels aren't the whole story. Night vision range and lens angle matter just as much for footage you can actually use.
Is 1080p Enough, or Do You Need 3MP/4K?
2MP (1080p) works fine for general home monitoring, where you just need to confirm someone entered.
4 to 5MP (2K/3K) is needed for face recognition, plate reading, or dispute evidence, and it's the current standard for shops and gates in 2026.
8MP/4K delivers forensic-level detail, but storage cost climbs sharply; an 8MP camera uses about 86.4 GB a day.
For most Bangladesh shops, 4MP hits the best balance between clarity and storage cost.
Night Vision Range and Color Night Vision, Explained
Standard infrared cameras give black-and-white footage in the dark, typically covering 10 to 30 metres on budget models.
Full-color night vision uses a larger lens aperture and better sensors to capture color in low light, useful for identifying clothing or a vehicle color at night.
If nighttime identification matters, look for a "full-color" label. The TP-Link VIGI C230 3MP full-color dome costs ৳3,450, and the C240 4MP full-color dome costs ৳4,700.
Field of View, and Why Fewer, Well-Placed Cameras Beat More, Poorly Placed Ones
A camera's lens decides how much it can see, and how far. A wider lens covers more space but doesn't reach as far. A narrower lens reaches further but covers less space side to side.
For a room, go with a 2.8mm lens. It takes in a wide 100 to 110 degree view, so you catch more of the space in one shot.
For a corridor or entrance, go with a 4mm lens. It covers a narrower 70 to 80 degrees, but that narrower view reaches further down the passage.
Where you mount the camera matters just as much. Put it in a corner, angled toward the door, not facing sunlight or a bright entrance light. Light shining into the lens washes out the picture.
One camera placed right will always beat two placed wrong. A single sharp 4MP camera aimed correctly gives you more useful footage than two cheaper cameras pointed the wrong way.
Load Shedding, Monsoon, and Weak Broadband: What Your CCTV Setup Needs to Survive
Bangladesh's power cuts, monsoon humidity, and patchy broadband outside Dhaka all affect how well a CCTV system actually performs.
Plan for these from the start, not as an afterthought once something fails.
What Happens to Your Camera the Moment the Power Cuts
Bangladesh still gets both scheduled and sudden power cuts. The moment the power goes, your recorder stops working too.
That means no footage gets saved during the outage, which is exactly when a break-in is most likely to happen.
IP cameras have the same problem. If the switch that powers them loses electricity, those cameras go dark too.
The fix is simple: add a small UPS or IPS as backup power.
Get one sized between 600 and 1000VA, matched to your recorder and switch. It keeps everything running through a normal power cut. Check EERNA's UPS and battery options to set this up.
The Right IP Rating Beats Monsoon and Heat
Bangladesh's weather is tough on outdoor cameras. Monsoon rain, humidity, dust, and salty air near the coast all speed up rust and damage.
That's why the IP rating matters. It tells you how well a camera survives water and dust. Look for IP66 at least. This means the camera stays safe through heavy rain and dust storms.
IP67 is even better. It means the camera keeps working even if water pools around it during a downpour.
Skip this check, and you could end up replacing a camera every year instead of every five years.
Surge protection matters too. Storms often bring power spikes, and a sudden spike can fry your camera or recorder. Uniview cameras usually come with this protection built in.
One more tip: don't use an indoor camera outside. An indoor dome or bullet camera on your veranda or gate will not survive Bangladesh's weather. Always pick a camera rated for outdoor use when it's exposed to rain or sun.
Internet Dependency: What Still Works If Your Connection Drops
WiFi and IP cameras with local SD card or DVR backup keep recording even if the internet drops.
Only remote viewing and push alerts stop working. Analog CC systems aren't affected at all.
For areas outside Dhaka with less reliable broadband, a hybrid XVR paired with a local hard drive keeps recording no matter what your connection is doing.
Choosing a Camera for Your Shop Specifically
A shop needs three things covered: a bullet camera at the entrance to scare off thieves, a dome camera over the cash counter to watch transactions quietly, and a camera at the stockroom door to see who goes in and out. Two-way audio is a bonus; it lets you talk to delivery riders or customers even after closing.
Cash Counter and Entrance Coverage: Deterrent vs Discreet Monitoring
At the entrance, a bullet camera works as a visible deterrent (Hikvision 2MP bullet, ৳2,580). At the cash counter, a dome camera gives discreet, high-resolution footage for transaction disputes (TP-Link VIGI C240 4MP dome, ৳4,700). Together they balance deterrence with usable evidence.
Stockroom and Back-of-Shop Blind Spots
Cover stockroom entrances and any point where staff moves between rooms unseen. Avoid mounting a camera directly above shelves, since this creates a blind spot underneath. A turret or dome with a 2.8mm lens gives wide coverage in tight back-of-shop spaces.
Two-Way Audio for Customer Interaction and Delivery Verification
Cameras with a built-in mic and speaker, like the TP-Link VIGI C340 4MP bullet at ৳4,600, let you verify delivery drop-offs remotely, verbally deter a shoplifter in the moment, and talk to customers at a closed gate after hours.
Common Mistakes to Avoid When Installing CCTV
The most common CCTV mistakes are pointing a camera into direct light, skipping backup power, and buying based on megapixels without planning for storage. All three are avoidable with a bit of planning before installation day.
Mounting Cameras Facing Direct Sunlight or Entrance Lighting
Glare from sunlight, streetlights, or mirrored surfaces reduces footage quality badly.
Point cameras away from direct light, use DWDR (Digital Wide Dynamic Range) where available, and test the angle at different times of day before final mounting.
Skipping a UPS or Backup Power Source
If the power goes out, your DVR or NVR stops recording. That's the exact moment a break-in or theft could happen, and you'd have no footage of it.
A small 600VA UPS fixes this. It keeps your system running through a typical one- to two-hour load-shedding period, so you're never left with a blind spot.
Buying Based on Megapixels Alone and Ignoring Storage
Twenty-four hours of 8MP/4K recording can use over 200GB per camera.
A four-camera 4MP system on H.265 encoding needs roughly 1.3TB a month. Calculate storage needs before choosing a resolution, and pair 4 to 5MP cameras with a 2 to 4TB hard drive for a shop setup.
Choosing a Brand You Can Trust
Dahua: reliable mid-range IP and CC cameras, strong XVR ecosystem, packages from ৳12,400. Browse Dahua CC camera options.
Hikvision: widely used, extensive model range, three-unit IP package at ৳23,400. Browse Hikvision CC camera options.
Uniview: competitive turret and bullet IP cameras, like the 4MP mini bullet at ৳5,900.
Jovision: an emerging brand with full-color audio dome options, like a 3MP model at ৳4,200.
For extra cabling, connectors, or mounts, check EERNA's CC camera accessories section.
Frequently Asked Questions About CCTV Cameras
How do I choose the right CCTV system?
Match camera type, resolution, connection, and storage to your space and risk level.
Which type of CCTV camera is best for home security?
One bullet at the gate, one turret or dome on the veranda, one dome indoors. Start at 2 to 3MP and upgrade to 4MP if nighttime identification matters.
How do I choose a security camera system for my business?
Prioritize entrance deterrence with a bullet camera, counter clarity with a 4MP dome, and stockroom coverage, paired with a 4 to 8 channel XVR or DVR and a 2 to 4TB hard drive.
Which is better, 2K or 5MP?
2K (around 4MP) suits most shops. 5MP works better for large or high-risk zones but needs roughly 2.5 times more storage.
Does a CCTV camera need internet?
No. Analog systems and IP cameras with local SD or DVR backup record fine without it. Internet is only needed for remote viewing and alerts.
How many days of footage can I store?
Four cameras at 4MP on a 2TB DVR give roughly thirteen to fifteen days. 1TB gives about seven days. For thirty-day retention, use a 4TB drive.
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