Through this helpful surveillance system,you can see the video signal on computer by usb port or on TV by av out function from the wireless CCD camera.That’s not all what this product bring you,connect the 2.4GHZ wireless receiver with the computer in your home or office through USB port,(keep the computer power on)you can see what’s happening in your home or office by another computer anywhere there’s internet!!!Specification: Built-in microphone for audio monitoring; View the picture on TV or computer for your option; Support remote surveillance by internet; Support high speed MPEG4 compression and real time image output. Support alarm by motion detection; Waterproof IR Day & Night Camera Pickup Device:1/4 -inch Sharp CCD image sensor Dimension(LxWxH):85x60x60mm Valid Pixel:PAL:628*582,NTSC:510*492 Horizontal Definition:420 TV Lines Scanning Frequency:PAL/NTSC: 50Hz/60Hz Minimum illumination: 0Lux/F1.2 Effective night vision range: 5-15m Transmission/Receiving Frequency:2.4GHz Transmission signal:Video and Audio Transmitting distance:Min 100m without block Transmission Power: 10mW/CE; 2mW/FCC Power supply: DC12V,500mA Operating temperature: -10degree/+85degree Carton Size: 20sets/carton, 23.5kg, 42.5x40x43cm Whole set includes cameras, receiver, adaptors, cable, battery clip and other fittings. Condition: New