Image sensor 1/4" Sony CCD Image resolution 2.0 mega pixels Lamp 6 pcs white LED(5600K) Accumulation point 5mm~50mm Photographing visual angle 70 degree Message output USB 2.0 Frequency 5725~5875MHz Power input DC 5V 250 mA(Provided by PC without adaptor) Channel selection 1-4 CH Receiving sensitivity 95dB Compatable computers Windows XP /Windows 7 /Windows Vista Features: Crisp, high quality images Simple operation and installation Light and easy mobility Equipped with anti-fog, non-spherical lens Super-wide automatically adjusting-focus lens Handpiece holder with automatic power-off function Singe image screen and 4 image intersected screen can be changed to each other. With VIDEO, S-VIEDO, USB and VGA output function. It adopts microwave transmission the same effect with satellite. Long distance and high clarity image transmission. Can be captured images by wireless control in store. It can be wireless controlled quarter image switch. 4 channels option Can be stored 4x28 PCS pictures totally. With quickly deleted image, re-captured and enlarge function. With specific remote control. Both freeze function of footplate and handiece. With multi-functional button. With multi-function of image signal output. Up and down page can be controlled by the button of handpiece. It can be with external infrared sensor without any fail.