CUTEDONKEY 7" Wireless Video Door Phone Doorbell Intercom Entry System Kit with 1 Camera 1 Monitor (Black) Two-way real-time intercom- when visitors press the doorbell button,press the indoor ok button can be real-time intercom motion detection- when visitors near outdoor camera,motion sensor automatically recognize and save video of the visitors Real time monitoring- when indoor machine is standby,press the monitor button,you can see the outdoor environment. 5.Remote unlock Remote unlock- confirm the visitors,press the unlock button, can automatically open the door.(only suitable for 12v electronic control lock) Video-recording function- Automatic video recording turn on motion detection, when somebody pass.or press the doorbell 5s nobody reply. automatic video recording,video time is 20s. manual video: press the video button, the video time is 90S