... Door Phone 1.Time Attendance,Unlock by password,card,button 2.Intercom, call other monitors,surveillance outsid Product name: Super Thin 7 ... Inch Color Video Door PhoneItem No.: LL-274Specifications: 1. Super thin 7'' TFT monitor.only 1.85cm, plastic camera2. ... for monitors: Silver, Red,Blue,White9. With functions of time attendance machine, unlocking by card, passwords and buttonCertificates:CE,FCC ...