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J4 Wireless Video Doorbell Camera — 2K Ultra HD, 5200 mAh, Chime Receiver Included
- 2K ultra HD, wide angle — 2560 × 1440 with a lens that takes in the visitor and the parcel shelf.
- 5200 mAh inside — the capacity is printed on the front of the box because that is what buyers compare.
- Smart IR without red glare — night footage stays neutral instead of glowing red at the door.
- Recordings auto-upload — clips are pushed to cloud or card before a thief can take the unit.
- Peel-and-stick install — 24/7 protection in about five minutes, chime receiver in the box.
2K Ultra HD with a Wide Angle
2560 × 1440 at up to 15 fps and a 67° diagonal lens — the visitor, the step and the parcel in one frame.
24/7 Protection, Not Just Doorbell Duty
The J4 runs as a doorway camera between rings: motion events, live view and recorded clips are all in the same app screen as the bell history.
Smart IR — Night Video Without Red Glare
IR illumination that does not paint the doorway red — the practical difference between footage a buyer will show a neighbour and footage they will not.
Doorbell Plus Chime Receiver
The box contains the doorbell and an indoor chime receiver, so the bell is heard inside the flat from day one.
5200 mAh, On the Front of the Box
Capacity is the spec retail buyers compare first. 5200 mAh gives 1–3 months of typical use and recharges over USB-C.
Fully Wireless — Five-Minute Install
No low-voltage wire, no hub, no electrician. Peel the backing, press it to the door frame or use the screws — that is the whole job.
AI Motion Detection
Person-shaped movement triggers the alert; everything else is filtered out, so notifications stay worth reading.
Recordings Auto-Upload
Clips are pushed off the device as they happen — to the cloud or the card — so removing the doorbell does not remove the evidence.
One-Tap Sharing
Each household member gets access to the same door in one tap, with their own login.
Full Technical Specification
Camera, video, audio, network, interface, power and packing data for the J4, exactly as confirmed by the factory.
Frequently Asked Questions
What resolution does the J4 record?
2560 × 1440 (2K), up to 15 fps. The factory artwork also describes it as 3MP class — same sensor, different label.
Does the night vision glow red?
No. The J4 uses smart IR, so the doorway is not lit up in red when the camera switches to night mode.
Where do recordings go?
Clips upload automatically to optional cloud storage and can also be written to a microSD card up to 128 GB.
How is it installed?
Peel-and-stick adhesive, or two screws if the buyer prefers mechanical fixing. No wiring either way.
How long does the 5200 mAh battery last?
1–3 months of typical use, up to 3 months standby, depending on event traffic and temperature.
Is the chime included?
Yes — an indoor chime receiver ships in the box with every unit.
Do you offer OEM and private label?
Yes. Logo, packaging, manual and colour from 300 units per model — send the target market and we quote.
2K doorbell vs the J2 at 1080p vs a wired doorbell
| Feature | J4 (2K) | J2 (1080p) | Wired doorbell |
|---|---|---|---|
| Resolution | 2560 × 1440 | 1920 × 1080 | 1080p |
| Night vision glare | Smart IR, no red glare | IR LEDs | Varies |
| Auto-upload | Yes | Partly | No |
| Indoor chime | Yes | Yes | Wired |
| Battery | 5200 mAh | 2 × 18650 | Wired |
| Weather rating | Outdoor housing | IP65 | Varies |
| Installation | Peel and stick | Adhesive / screws | Electrician |
| Rental friendly | Yes | Yes | No |
Specifications
| Model | J4 |
|---|---|
| Resolution | 2560 × 1440 (2K ultra HD), up to 15 fps |
| Camera | 1/3.2" CMOS, 3.2 mm @ F1.9 — 67° diagonal / 59° horizontal lens |
| Coverage | 90° scene coverage, up to 5 m |
| Frame rate | Up to 15 fps |
| Compression | H.265 (HEVC main profile), 32 Kbps–3.5 Mbps adaptive |
| Night vision | 4 × 850 nm IR LEDs, up to 5 m, automatic ICR switch |
| Motion detection | PIR sensor, 1–5 m range |
| Audio | Two-way voice, G.711a compression, 3D noise reduction |
| Smart alarms | Motion, person detected, doorbell press |
| WiFi | IEEE 802.11 b/g/n — 2.4 GHz only |
| Protocols | TCP/IP, UDP, P2P, DNS, DHCP, RTSP |
| Storage | Micro SD card up to 128 GB, optional cloud storage |
| Power | 5200 mAh rechargeable battery, USB Type-C 5 V input |
| Battery life | 1–3 months typical use, up to 3 months standby |
| App & sharing | iOS / Android app, device sharing, mirror flip |
| Operating temperature | −20 °C to 60 °C, RH < 95% |
| Night vision | Smart IR — no red glare at the door |
| Chime size | 40 × 60 × 13 mm |
| Best for | Retail shelves where resolution and mAh are compared side by side |
| MOQ | 50 units per model — mixed models and mixed cartons welcome |
| Lead time | Up to 1,000 units ship now; over 1,000 units in 7 days |
| OEM / ODM | From 300 units per model — logo, packaging, manual and colour |
| Certificates | CE, RoHS, FCC |
| Ships from | Shenzhen, China |
Packing & Freight
| Boxed unit weight | 0.39 kg |
|---|---|
| Colour box size | 165 × 127 × 55 mm |
| Units per carton | 40 pcs |
| Carton size | 530 × 345 × 266 mm |
| Carton gross weight | 16.3 kg |
What's in the Box (Plug options: US / EU / UK)
- Video doorbell
- Indoor chime
- Mounting kit
- Type-C charging cable
- Screw kit
- User manual
- Retail packaging
Compare with other video doorbells
Where the J4 fits in the range
The J4 is the 2K model built for the shelf: the battery capacity and the resolution are both printed on the front of the box, and the indoor chime receiver is in the carton. For a retailer, that is an easier sell than a spec table.
It sits above the J3 for buyers who want the biggest number on the box, and above the J1/J2 for anyone who has already owned a 1080p doorbell and wants a reason to replace it.