Home/hotel Video doorbell YSM311 is a door camera for home/hotel security with 2.8 inch LCD indoor unit for monitor, doorbell remind before opening the door. It's with 2.8 inch LCD monitor, Door camera and Zoom in function, Been widely used in Hotel and home security propose.

[Product features]
1. Video door bell for security before opening
2. 105 degree wide angle camera and 4 times zoom in the picture make you can watch clearly
3. 2.8 inch TFT-LCD indoor unit for monitor
4. No wire, installed in the peephole, just DIY using
5. Standalone battery power supply, convenient for installation. 3 small batteries can use 5 months. Others use DC adapter for power supply. How do you find a plug in the door?
6. Automatic power saving, low power remind function
7. Super thin and fashion design for high level apartment door

[Technical specifications]
Power: 3 x new alkaline batteries
Camera: 0.3 Mega Pixel camera
Display Screen: 2.8-inch high definition screen TFT-LCD
Peephole size: 15mm
Camera angle of view: 105°
Operating temperature: -10 degrees Celsius to 50 degrees Celsius
Operation Humidity: 10% ~ 85%
Size: Indoor unit: 108*96*16mm
Outdoor unit: 62*40*12mm