Photoelectric insulated RS485 controlling mode, strong anti-jamming and long-distance transmission up to 1.5km. Controls up to 128 units, each可设置1-255 addresses. Variable speed operation supports built-in pan/tilt of camera. Easy to set and run preset positions and tour groups. Easy to set left and right limit positions and run scan between them. Home (default) position can be set, activated, and closed by the controller. LCD display serves as man-machine interface, providing intuitive, convenient operation with clear information display. Communication: RS-485. Protocol: Pelco-D, Pelco-P. Baud Rate: 1200 / 2400 / 4800 / 9600 / 19200. Communication Distance: 1500M (4900ft) using twisted-pair cable. Control functions: up, down, left, right, zoom in, zoom out. Maximum controllable cameras: 128 units. Camera ID range: 1 - 255. Operating Temperature: -10°C ~ 60°C. Relative Humidity: 90% RH. Power Supply Adapter Input: 100 - 240V AC. Output: DC 12V, 200mA. Plug Type: US Plug, compatible with Canada, India, Mexico, Thailand, Taiwan, United States, Philippines, etc. Plug Type: EU Plug, compatible with Indonesia, Germany, France, Spain, Italy, etc. Color: Black. Material: Plastic. Voltage: 110-220V. Package Includes: 1 x Keyboard Controller, 1 x Power Supply Adapter. Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement error allowed: +/- 1-3cm.