2.4GHz 2.4inch digital wireless baby monitor 2.4inch 320* 240 RGB color LCD Transmission Frequency: 2.4GHz ( ISM band) Frame speed: 15-25frame, Strong signal high frames Digital zoom: 4x Electronic zoom Transmission distance: 150M â 250M Open accessibility " Working current: 220mA max( video+ audio) receiver 150mA max( voice) camera" Low-voltage directive: 3 level ( receiver LCD screen display) Transmitting power: 17dBm Battery: Ordinary AAA batteries 1.5V