FEATURES: Four Bell AHD Video Intercom-Outdoor Station AHD 720P camera, 90° angle view Blue light keypad background of ring button IP65 waterproof level IR LED light for better night vision Compatible with models of CVBS/AHD doorbell Surface mount 10pins cable support power for lock and connect to DVR to monitor doorbell 24H Dimension (L x W x H)-32mm*116mm*210mm