(1)One door station can support up to four indoor phones.If needed,it can be extended to two door stations supporting up to four indoor phones
(2)Aluminiumdoor station with remote door unlocking.
(3)LED in the door station provides a clear picture even in nighttime.
(4)B/W display and double Ding-Dong ring.
(5)30 seconds ring tones are available,30 seconds surveillance, 120 seconds intercom.
One door station can support up to four indoor phones.If needed,it can be extended to two door stations supporting up to four