CP-HAV-K401B 4" TFT B & W Video Door Phone 4” B&W Screen Full duplex audio LED powered monitor indicator Pushbutton for manual activation of camera when the monitor is in standby mode On/Off Button with Volume Control (Mid/High status) Brightness and Contrast Controls, Colour Control, Mute Option Outdoor Unit Lens: 1/3” CCD, Auto Iris Minimum illumination : 0.5 Lux Minimum Resolution: 420 HTV Lines IR Lights for night Vision Operative temperature range: -10 ~ +50ºC Amplifier power: 1W (approx) Humidity: -10 ~ +50ºC, 90% RH max.