7" Color Video Door Phone 1.Time Attendance,Unlock by ... surveillance outsid Product name: Super Thin 7 Inch Color Video Door PhoneItem No.: LL-274Specifications: 1. Super thin ... , plastic camera2. CMOS camera, handfree, audio and video communication.3. Unlock, intercom, call other monitors, ... colors for monitors: Silver, Red,Blue,White9. With functions of time attendance machine, unlocking by card, ...