Red connector = 12V DC power; Yellow connector = 75 Ohm / 1Vp-p video output (BNC). Operating Temperature: 14 F ~ 140°F (-10°C ~ 60°C) Audio Wiring: 2 conductors w/overall shield. Use Aiphone #822202 wire. Audio Wiring Distance: 1650' (24AWG); 2650' (22AWG); Video Wiring: Independent BNC connection from sub station pigtail to destination video device.