[Video:]We use TFT-LCD screen, with high resolution, image is very clear. The screen color and brightness can be adjusted. [IR Night Vision:] We use 0.3 Mega Pixels camera with 5 infrared light. Provides clear vision of visitors even in the darkness of night. [Transmission Distance:] The max distance of audio & video transmission is 100 meters if you use RVV4*1.0 cable. [Functions:]Support answering, monitoring and unlock, 25 chord ringtones optional, two-way video intercom. Very easy to install. [Applications:]Our camera with 2 call buttons, each button can control a monitor independently. Can be used for multi apartments, especially suitable for low-rise buildings, don’t need to connect to internet!, Weight: 4.0 pounds, Manufacturer: LIBO Smart Home