17in color TFT LCD screen, which has no radiation, low power consumption and high definition. 2IR-CUT camera has night vision function, it can provide clear picture even at night. 3It features electronic lock control, hands free intercom and outdoor monitoring functions 4Up to 25 ringtones can be selected, it can give you sweet-sounding and pleasant using experience. 5Easy to install, no complicated tools required, convenient for using.