... colored 3.Support card, pin and card&pin three ways Door Phone with Call, Intercom, Surveillance and Unblanking Function Feature: ... adjustable 5.Attaching a set of power distribution source adapter Out door unit1.Metal shell, Nixietube tell time or date, elegant appearance2 ... pin and card&pin three ways4.Simultaneously has the Video Door phone and the Access Control function, is the first choice ...