Effective Pixels:800 x 480 Wiring:4-wire pin end Room to Room intercom:Yes Adapter Input:AC100 - 240V 50-60HZ Adapter Output:DC 15V 1500mA Case:ABS Plastic Working Temperature:-35 °C ~ 55 °C Installation:Wall mounted Dimension:185mm(L) x 30mm(W) x 195mm(H) Function:Intercom, monitor, unlock the door