Handsfree Connection: 1 of two-core wire (no polarity) Appearance color: gray Installation: surface-mounted Working voltage: 15V (whole system supply power) Monitor outdoor phone and intercom, remotely unlock Time for display: 60 seconds Function: video intercom, surveillance and unlocking Simple push-button operation Receive alarms and memory alarm information Monitor turns on instantly when call button is pressed Status indicators:Power: lights when power is on Operate: lights when system in useScreen size: 4 inches OEM/ODM orders are welcome
