Features 1) Door opening from monitor and from outdoor 2) Mounting surface 3) Power supply from internal 4) Intercom 4-wire and 2-wire yes 5) Memory function 4-wire and 2-wire yes
[相关标签: B/W, Video, Door, Phone]Features 1) Door opening from monitor and from outdoor 2) Mounting surface 3) Power supply internal (SMPS) 4) Intercom 4-wire yes, 2-wire no 5) Slave monitor 4-wire yes, 2-wire yes 6) Slave handset 4-wire yes, 2-wire no 7) Memory function 4-wire and 2-wir
[相关标签: B/W, Video, Door, Phone]