Doorbell button: 1 pcs ; Sensor: 2.1 Mpx CMOS ; Camera resolution: 1920 x 1080 ; Camera view angle: 146 ° ; IR illuminator; Alarm inputs: 4 pcs ; Relay outputs: 2 x NO/NC ; Main features: Bidirectional communication, Tamper detection - removing from mounting surface ; Power supply: PoE (802.3af), 12 V DC ;