... &conversation, gate moniter 8cord ringer tone, surface mounting; Handsfree operation; color CCD camauto night IR ... outdoor stations,gate moniteringhandsfree function 8cord ringer tone Surface mount;Handsfree operation;Easy install and convenient to useSpecification ... resolution:480*480~ Wiring method:6core & AV input ~ surface mounting: video calling & conversation, door gate monitoring, handsfree ...