Features:Use coaxial lines to transmiss the real time digital signals, transmission distance maximum up to 220m.Fast and easy to install, save the cables, the installation cost and time.Convenient to use. Passive device, no power required.Built in surge guard, safety in use.The traditional coaxial line analog camera system is upgraded to the network HD camera, both of which can be replaced directly.Specifications:Video: PAL, NTSC, SECAMStandard: IEEE802.3 10base-TSpeed: 10/100MbpsLongest Distance: 220MCable: Coax Cable (RG59)Working Temperature: -20 to +70 Storage Temperature: -40 to +150 Humidity: (non-condensing) 0-95 PercentSize: 2.0*6.7*1.8cm/0.8*2.6*0.7in (Cable Excluded)Pacakge Weight: 49g/1.7ozPackage List:1 * Pair Passive IP Network Coaxial Transmitter.