Specifications: 1> Controls and Programmes all camera and PTZ functions 2> Can be used with up to 255 cameras 3> Progressive joystick for precise control 4> Pelco P/D protocols, 2400, 4800, 9600Bps baud rate selectable 5> Zoom Control: Push Button contol In/Out 6> Signal: RS-485 (Multi-port Half-Duplex) 7> RS-485: RS-45 Connector 8> Power Input: 12VDC((-15/+50%) / 0.8Watts 9> Transmitting Distance: 1200meters(Max) 10> Physical Size: 133(W)*190(H)*64(D). Weight: 525g.