1、STABLE AND RELIABLE: RS485 bus control, can realize 1500 meters remote control, can ensure stable and reliable communicate with analog coaxial dome camera. 2、SUPPORT COMMUNICATE PROTOCOLS: 3D PTZ camera keyboard supports for PELCO D, for PELCO P,AD and other communicate protocols. 3、MULTI PURPOSE: RS485 dome camera keyboard is multi purpose, can control the head and lens, can set, start and close the head cruise. 4、POWER FAILURE MEMORY: Analog 3D keyboard joystick PTZ controller has power failure memory function, easy to use and restore settings. 5、FLEXIBLE OPERATION: The joystick adopts 3D design, which can flexibly control the up, down, left, right and zoom functions of the PTZ. Item Type: Analog PTZ Camera Controller Material: ABS Communicate Interface: RS485 Bus Communicate Distance: Approx. 1500meters / 4921ft (Approx. 0.5mm / 0.02in  twisted pair) Communicate Protocol: for PELCO D, for PELCO P, AD Baud Rate: 1200bps, 2400bps, 4800bps, 9600bps, 19200bps , 38400bps Communicate Parameters: 8 Data Bits, 1 Stop Bit, No Parity Joystick: 3 Dimensional (Joystick Control Ball Machine up and Down, Left and Right, Twisting the Joystick Ball Machine Can Zoom) 1 x Analog PTZ Camera Controller 1 x Instruction Manual 1 x Adapter