Photoelectric in sulated RS485 controlling mode,strong antijamming and longdistance trasmission (Max 1.5km)Control up to 128 units, each unit can be set 1255 addressesVariable speed orperation can be applied to the builtin Pan/tilt of cameraEasy to set and run the preset positions and tour groupEasy to set the left and right limiting positions and run the scan between them.Home (default) position can be set up, activated and closed by the controller.LCD display, as manmachine interface, LCD display board is more intuitionist, convenient, each to understand, plentiful information.Communication: 485Protocol: PelcoD, PelcoPBaud Rate: 1200 / 2400 / 4800 / 9600 / 19200Communication Distance: 1500M (4900ft) twistedpaircontrol functionup,down,left,right,zoom in,zoom outMax controllable Cameras: 128 unitsCamera ID from: 1 255Ambient Temperature: 10C ~ 60CRelative Humidity: 90% RHPower Supply AdaptorInput: 100 240V ACOutput: DC 12V, 200mAPlug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on.Colour:BlackMaterial:plasticVoltage: 110220VPackage Contents:1 x Keyboard Controller1 Supply AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/ 13cm.