One-sentence conclusion:Renovating, have a false ceiling, or can run cables → PoE; Renting, don't want to drill walls, and just want a quick installation → WiFi. Neither is about being "better or worse"—it's a trade-off between "one-time hassle" and "ongoing hassle": PoE is painful to install once, then you can leave it alone for the next five years; WiFi takes half an hour to set up, but afterward you may have to deal with disconnections, recharging, and signal dead zones.
1. First, distinguish the four power and connection methods
| Type | Power supply | Connection | Typical price | Suitable for |
|---|---|---|---|---|
| PoE wired | Power and data over an Ethernet cable (802.3af/at) | Ethernet cable | HK$399 起 | Shops, offices, and homes with false ceilings |
| WiFi plug-in | Dedicated power adapter | WiFi 2.4/5GHz | HK$259 起 | Indoor locations with a power outlet and good signal |
| Battery-powered WiFi | Built-in battery＋solar panel | WiFi | HK$399 起 | Rental properties and outdoor locations without a power outlet |
| 4G LTE | Battery or solar power | Mobile network SIM | HK$599 起 | Construction sites, village houses, and locations without broadband |
These four are not mutually exclusive upgrade paths; each is suited to different on-site conditions. Here's how to choose.
2. How to choose a WiFi Cam
Five conditions you must confirm
- 2.4GHz or 5GHz——2.4GHz penetrates walls better but is more prone to interference; 5GHz is faster but has poorer wall penetration. Most outdoor cameras only support 2.4GHz, so check before buying.
- Actual Wi-Fi signal strength——The signal at the camera's location should be ≥ -70dBm. Use your phone to test the connection at that location before installation—don't rely on guesswork.
- Resolution and bitrate——4MP is already sufficient for clearly capturing faces (within about 3–5 m); 8MP is only worthwhile with better lighting.
- Night vision type——Infrared (black and white)／Full color (requires a fill light)／Smart dual-light. Full-color mode still requires additional lighting in completely dark environments and consumes more power.
- Local storage vs cloud——Models that support microSD do not require a monthly fee; for cloud-only models, calculate the long-term cost.
Indoor vs outdoor
| Item | Indoor camera | Outdoor camera |
|---|---|---|
| Waterproof rating | Not required | At least IP65／IP66 |
| Pan-tilt-zoom (PTZ) | Common and convenient for viewing the entire home | Yes, but the pan-tilt-zoom unit is a weak point for water ingress |
| Power supply | USB 5V is common | Mostly 12V or PoE |
| Price | Lower | Higher |
III. How to Choose a PoE Cam
The biggest advantage of PoE is not image quality, butPower and data handled through a single Ethernet cable—There is no need to reserve a power outlet next to the camera. For shop ceilings and high exterior walls, this directly determines feasibility.
Four conditions you must confirm
- PoE standard—802.3af (15.4W) is sufficient for general cameras; 802.3at (30W) is for models with pan-tilt-zoom units, heaters, or auxiliary lights. Check the camera’s power consumption before purchasing.
- Whether it supports ONVIF—This determines whether you can mix and match NVRs from different brands. More details below.
- Maximum Ethernet cable length: 100 meters—Beyond this, you will need to add a switch or switch to fiber optic. Most shops are within this range, but factories or village houses should take note.
- NVR with built-in PoE or an external switch—See Section Five.
IV. Reolink or EZVIZ? Should You Mix Brands?
Both are among our store’s main product lines, but they have distinctly different positioning:
| Item | Reolink | EZVIZ |
|---|---|---|
| Strengths | Highly integrated PoE system, with native pairing between NVRs and cameras | Wide range of models, including a full selection of pan-tilt-zoom cameras and doorbell models |
| NVR | NVS series from 4 channels to 36 channels, all with built-in PoE ports | X5S 8-channel, R5C NAS model |
| App | Reolink App, with more technical features | EZVIZ App, with a more user-friendly interface |
| Local storage | Both NVR＋microSD are supported | NVR／SD card／monitor hub (SD7) |
| Price range | Mid-low to high | Low to mid |
NVRs currently available:
| Model | Price | Suitable for |
|---|---|---|
| Reolink NVS4-4-Channel PoE NVR HD PoE Network Video Recorder [Hong Kong Official Stock] | HK$830 | 4-channel entry-level, small shop or home |
| Reolink NVS8-NHD 8-channel PoE network video recorder (built-in 2TB hard drive) [Hong Kong Authorized Stock] | HK$2,599 | 8 channels with 2TB hard drive, the easiest option |
| Reolink NVS8-NHD 8-channel PoE network video recorder [Hong Kong Authorized Stock] | HK$1,178 | 8-channel recorder only, choose your own hard drive |
| Reolink NVS16-NHD PoE network video recorder [Hong Kong Authorized Stock] | HK$1,899 | 16 channels, medium-sized shop |
| Reolink NVS36 /RLN36 PoE network video recorder [Hong Kong Authorized Stock] | HK$1,899 | 36 channels, large or multi-story premises |
| EZVIZ X5S-R100-8W NVR smart surveillance recorder (CS-X5S-R100-8W) [Hong Kong Authorized Stock] | HK$499 | EZVIZ 8-channel model, works best with EZVIZ cameras |
Should you mix brands?
The answer depends on two situations:
| Situation | Recommendation | Reason |
|---|---|---|
| Buying everything new | Not recommended to mix brands | An NVR and cameras from the same brand can use a proprietary protocol, providing the most complete features (human detection, playback markers, two-way audio) |
| Already have an old NVR and want to add cameras | You can mix brands(Must support ONVIF) | ONVIF Profile S supports basic recording and streaming |
| Using a third-party NVR/NAS | ONVIF support must be confirmed | Without support, you may only be able to view the video; recording and smart features will be unavailable |
The practical cost of mixing brands:With a same-brand setup, a proprietary protocol can let you “tap once to play back the segment with human detection”; with mixed brands, you will usually be limited to continuous recording. The features are not fully equivalent—the difference is between “can record” and “easy to use.”
Practical advice:Use a single brand within the same system whenever possible. If you already have a Reolink NVR, buy Reolink cameras when expanding; the same applies in reverse. ONVIF is only a lifesaver when you already have a collection of old devices from different brands.
5. WiFi Cameras Currently Available (Sorted by Price)
| Model | Price |
|---|---|
| Ezviz 螢石 H1c 1080P Smart Home WiFi indoor security camera 【Hong Kong Authorized Stock】 | HK$189 |
| Reolink E321 3MP WiFi network camera [Hong Kong Authorized Stock] | HK$259 |
| Reolink E331 5MP WiFi network camera [Hong Kong Authorized Stock] | HK$379 |
| RENPHO Elis Aspire WiFi smart body fat scale Hong Kong Authorized Stock | HK$410 |
| KODAK 10-inch HD digital photo frame (non-WiFi version) - RDPF-1028C 【Hong Kong Authorized Stock】 | HK$450 |
| KODAK 10-inch narrow-bezel digital photo frame (10.1" IPS WiFi) - RCF-1018 【Hong Kong Authorized Stock】 | HK$558 |
| Reolink E1 Zoom 8MP WiFi Network Camera [Hong Kong Official Warranty] | HK$688 |
| KODAK 10-inch WiFi Digital Photo Frame (Wood-Colored Casing) - RCF-1012W [Hong Kong Official Warranty] | HK$760 |
| Kodak RCF-106 10" WiFi Digital Photo Frame - Black [Hong Kong Official Warranty] | HK$788 |
| Reolink Video Doorbell WiFi Fully Wireless Smart Video Doorbell + Chime Camera [Hong Kong Official Warranty] | HK$860 |
| Reolink E1 Outdoor 5MP WiFi Network Camera [Hong Kong Official Warranty] | HK$899 |
| Reolink W330 8MP WiFi Network Camera [Hong Kong Official Warranty] | HK$899 |
| Kodak RWF-127V (Black MDF) WiFi Digital Photo Frame, Genuine Hong Kong Stock | HK$979 |
| Reolink W437 8MP WiFi Network Camera [Hong Kong Official Warranty] | HK$1,089 |
| Reolink Duo 2 WiFi 8MP WiFi Network Camera [Hong Kong Official Warranty] | HK$1,199 |
| Reolink Elite WiFi Smart 4K 8MP Dual-Lens Plug-and-Play Security Camera | HK$1,299 |
VI. PoE Cameras Currently Available (Sorted by Price)
| Model | Price |
|---|---|
| EZVIZ H4 POE 3MP Outdoor Waterproof Smart Camera (CS-H4-R201-1H3EKFL (2.8mm)) | HK$399 |
| EZVIZ H5 POE 3MP Outdoor Waterproof Smart Camera (CS-H5-R201-1H3EKFL (4mm)) [Hon | HK$399 |
| EZVIZ H8C POE 3MP Outdoor Waterproof Smart Camera (CS-H8c-R200-1K3EKFL(4mm)) [ | HK$399 |
| Reolink P324 PoE Network Camera | HK$429 |
| Reolink P320 PoE Network Camera | HK$569 |
| Reolink CX410 PoE Network Camera | HK$688 |
| Reolink P334 8MP PoE Network Camera [Hong Kong Official Warranty] | HK$729 |
| Reolink P330 8MP PoE Network Camera [Hong Kong Official Warranty] | HK$749 |
| Reolink 5MP PoE Camera Video Doorbell with Chime Perso | HK$778 |
| Reolink 5MP PoE Camera Video Doorbell with Chime Perso | HK$778 |
| Reolink P337 PoE Network Camera | HK$850 |
| Reolink P434 PoE Network Camera | HK$869 |
| Reolink RLC-81MA PoE Network Camera | HK$874 |
| Reolink E1 Outdoor SE PoE Network Camera | HK$899 |
| Reolink P340 PoE Network Camera | HK$938 |
| Reolink P344 PoE Network Camera | HK$938 |
| Reolink P430 PoE Network Camera | HK$980 |
| Reolink RP-PCB8M 800 ten-thousand-pixel PoE Network Camera [Hong Kong Official Stock] | HK$1,060 |
7. Battery and 4G: Rental Properties and Special Sites
| Model | Price | Best For |
|---|---|---|
| Reolink Argus 3E Outdoor Waterproof Battery Camera (3MP) - Hong Kong Official Stock | HK$399 | Most affordable battery camera, no cabling required outdoors |
| Reolink Argus 3 Ultra 800 ten-thousand-pixel Outdoor Waterproof Battery Camera [Hong Kong Official Stock] | HK$849 | 8MP battery camera |
| EZVIZ CB2 WIFI Palm-size Fully Wireless Battery Smart Camera（CS-CB2-R100-2D | HK$470 | Palm-sized and easiest to install in a rental property |
| EZVIZ CB2 4G LTE BK/WH Fully Wireless Battery Smart Camera（CS-CB2-R105-1K3F | HK$599 | Locations without broadband |
| REOLINK Go Plus H.265 4G LTE 2K 4MP LTE Outdoor Waterproof Battery Camera [ | HK$1,188 | 4G LTE, construction sites or village houses |
The practical limitation of battery cameras: recording relies on event triggers rather than continuous 24/7 recording. If you need to review any time period after the fact, a battery camera cannot do it—you need PoE or a plug-in WiFi camera.
8. Decision-Making Guide (Follow This)
| Your Situation | What to Choose |
|---|---|
| Shop/office, cabling is possible | PoE + NVR |
| Home, with renovation planned | PoE (one-time hassle, then zero maintenance) |
| Rental property, don't want to drill into the walls | Battery WiFi + microSD |
| Power outlet available but no network cable | Plug-in WiFi |
| No broadband at all | 4G LTE |
| Need continuous 24/7 recording | PoE + NVR (battery cameras cannot do this) |
| Only need live viewing, no playback required | WiFi + microSD is sufficient |
9. Frequently Asked Questions
Can WiFi cameras record 24 hours a day?
Technically yes, but this will use a lot of bandwidth and storage, and recording will stop if the WiFi connection drops. For 24/7 recording, use PoE.
Do PoE cameras have to use a PoE switch?
You can also use a PoE injector for single-camera power supply, but for multiple cameras, a switch or an NVR with built-in PoE is recommended.
Can Reolink cameras connect to an EZVIZ NVR?
Only if both devices support ONVIF, and smart features will be greatly reduced.
Does the NVR have to be the same brand?
Not necessarily, but using the same brand provides the most complete functionality. It is a trade-off between convenience and compatibility.
Can Cat5e network cables be used?
Yes, they are sufficient for distances within 100 meters. Cat6 leaves room for future upgrades.
What happens during a power outage?
The entire PoE system will shut down. To keep it running, you need to add a UPS, and both the NVR and switch must be connected to it.
10. Further Reading and Related Topics
- Complete PoE Wired CCTV Solution——Budget Packages and Practical Wiring
- PoE Power Supply and NVR Selection——Power Supply Budget, Bandwidth, and Hard Drive Calculations
- 27 EZVIZ Models Compared
- Complete Reolink Battery Camera Range
- How Much Does Shop Security Cost?
Further Reading
Further Reading
Further Reading
Further Reading