1. Multi-functional design, camera head, high-speed dome, constant speed dome, low-speed dome, lens control and preset point settings and calls 2. Input voltage: DC12V/500mA 3. Power consumption: less than 5W 4. Communication interface: RS485 bus 5. Communication distance: 1500m (0.5mm twisted pair) 6. Communication protocol: PELCO-D, PELCO-P, SAMSUNG, AD, PANASONIC 7. Baud rate: 9600 8. Communication parameters: 8 data bits, 1 stop bit, no parity 9. Joystick: - 3 axis (joystick control the ball machine up and down, twist the joystick ball machine can zoom) - 4 axis (joystick control ball machine up and down, twist the joystick ball machine can be zoomed, joystick more OK button) 10. Display: LCD 11. Interface description: keyboard control DVR communication baud rate of 9600bps, not optional, so the DVR internal 12. communication baud rate must be 9600bps, otherwise the operation can not DVR hard disk recorder 13. Weight: about 895g