Overview: Kdb700 wireless video door phone, the battery is 4000mah, supports 2 outdoor cameras and three indoor monitors max. One indoor monitor could talk to another monitor, this is very different and special design compares to other door phones.The main function is doorbell, intercom, monitor, remote unlock, motion detection, take and save videos and photos in tf card.Outdoor camera, with ip55 waterproof, could work with 9-16v ac/dc power supply, with motion sensor of max. 3 meters detection distance and clear night vision. Specification: Battery 4000mah Night vision Motion sensor 300.000 pixels Remote unlock Ip55 waterproof 7inch tft screen Two-way intercom 300 meters wireless 3 monitors extendable Picture&video recording