7" Color Video Door Phone 1.Time Attendance,Unlock by password,card,button 2.Intercom, call other monitors,surveillance ... monitor.only 1.85cm, plastic camera2. CMOS camera, handfree, audio and video communication.3. Unlock, intercom, call other monitors, surveillance outside4 ... Red,Blue,White9. With functions of time attendance machine, unlocking by card, passwords and buttonCertificates:CE,FCC,RoHS