Photoelectric in sulated RS485 controlling mode,strong anti-jamming and long-distance trasmission (Max 1.5km)Control up to 128 units, each unit can be set 1-255 addressesVariable speed orperation can be applied to the built-in 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 man-machine interface, LCD display board is more intuitionist, convenient, each to understand, plentiful information.Communication: RS-485Protocol: Pelco-D, Pelco-PBaud Rate: 1200 / 2400 / 4800 / 9600 / 19200Communication Distance: 1500M (4900ft) twisted-paircontrol 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 United States, the Philippines and so on.Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.Colour:BlackMaterial:plasticVoltage: 110-220VPackage Contents:1 x Keyboard Controller1 x Power 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 +/- 1-3cm.