Main Features:     digital wireless video monitoring, the picture is vivid.     LED indicates volume, may flash along with the volume.     digital wireless audio monitoring, sound adjustable.     the demonstration end and photograph end audio to speak, is very convenient. Audio  and video external output.     video menu tries to hit monotonously, in 30 seconds having not pressed any, the menu surface will vanish automatically returns to the inspecting mode.     if the product may be out of the transmission region, the antenna instruct glitter may support the external power supply or battery.     demonstrates the battery low electricity or the charge instruction. Main Parameters:    Received frequency 2.400GHz~2.483GHz Video frequency service pattern PAL/NISC Automatic cut over Modulation mode FSK Working Temperature -20~60/ -10~50 View AngleU/D/L/R)(CR>10) 10/30/45/45(Min) Resolution(dot) 480(W) x 240(H) Camera TV System PAL NTSC Validity Pixel 628(H) x 582(V) 510(H) x 492(V) Image Device 1/4CMOS image sensor Horizontal Definition 380TV Line Transmission Signal Video & Audio Minimum Illumination 3Lux/F1.2 Scanning Frequency PAL/CCIR: 50Hz NTSC/EIA:60Hz Transmission Distance 200M Power Adapter DC5V/1A Transmission Power 17dBm Power Consumption 1W Receiver Receiving Sensitivity -85dBm LCD 2.4'' TFT LCD Power off at low oltage DC5V/800mA Power Adapter DC5V/800mA Dimension 123 x 72 x 24mm Weight 200g Receiving Signal Video & Audio Battery Build-in 3.7V/350mAh lithium battery Power Consumption 3W