LYD W208E1 Wireless Camera Kit with Upto 4 Channels and 100m Transmission Distance (Silver) 380TVL of horizontal definition,Wireless camera kits with spy cameras, up to 4channels,Audio and Vedio,100m transmission distance without block,manual tune button. Micro-camera easy for installation. Receiver with 4 channels exchangeble manually. Audio monitoring with microphone in camera. 100m transmission distance without block.