Characteristics: The keyboard output adopts photoelectric insulated485 control so that it can provides strong anti-jamming and long-distance transmission Using the keyboard, you can set up dome camera or decoder address at the range of: 1~255 Through the keyboard, variable-speed operation can be applied to the high speed dome camera Via the keyboard, pre-set positions and tour group can be setup and previewed in the high speed dome camera Lens zoom ratio, focus and iris can be manually controlled via the keyboard Joint-control can be realized by simultaneously using the keyboard with one or more DVR mainframes or built-in hard disk VCRs The keyboard has menu displaying LCD,3D controlling joystick, as well as DVR or built-in hard disk VCR panel controlling functions Technical data: Protocol supported: Total Support about 40 different protocols including PELCO -D, PELCO –P. Baud rate of communication: 2400/4800/9600/19200 BIT/S Range of communication: 1200M (0.5MM twisted-pair) Power supply: 9~12VDC 5W Ambient temperature: 0--+40°C Relative Humidity: below 90%RH Dimension: 330(L) x 176.6(W) x 112.5(H) mm (including the height of the joystick)