A 4000mAh battery ensures that the baby monitor works well day or night Infrared night vision, lullaby playback, temperature monitoring, VOX mode and more functions to protect the baby's comfortable sleep 5.0 inch LCD screen with zoom function. The resolution is 720 x 1280P and the magnification is 4 times 360 degree horizontal and 115 degree vertical rotation, and remote control to adjust the angle of the camera to better watch each baby's behavior When it detects that the room is dark, it automatically switches to night vision, making it easy to see your baby while sleeping at night Two-way audio ensures easy real-time communication, so you can talk to your loved ones at anytime Temperature function allows you to know your baby's ambient temperature at all times The screen automatically wakes up when it detects a baby crying Countdown function, you can set 4 alarm clocks to feed your baby on time The transmission distance can reach about 300m (open space) Specification: Frequency: 2.4 GHz Battery: 4000mAh/3.7V Night vision distance: 15ft (5m) Sensitivity > 60 dBA