7" Color Video Door Phone 1.Time Attendance,Unlock by password,card,button 2.Intercom, call other ... monitor.only 1.85cm, plastic camera2. CMOS camera, handfree, audio and video communication.3. Unlock, intercom, call other monitors, surveillance ... colors for monitors: Silver, Red,Blue,White9. With functions of time attendance machine, unlocking by card, passwords and buttonCertificates:CE,FCC,RoHS