(2)Audio indoor phones are compatible.
(3)Dual calling, Surveillance, intercom and remote door unlocking are main functions.
(4)3.5 inch Color TFT screen display
(5)LED in the door station provide a clear picture even in night time.
(6)30 seconds ring tones are available, 30 seconds active surveillance, 120 seconds intercom
(7)Double Ding-Dong ring or chord melody rings are available
(8)Handsset indoor phone;
(9)Avoid to unlock by error if no calling.
(10)Unique design to unlock the door.
(11)Prevent to unlock by taking apart the outdoor unit because the outdoor unit has no unlock line. This system unlock by indoor unit.
(12) Power Source: DC 12V
(13)Operating temperature: -40C~70C
(14)Chime: Ding dong chime
(150Ambient temperature: -40C to +40C
(16)Ambient humidity: 45 to 95%