1. LCD display. 2. Use 4 Axis optical joystick 3.Manifold of protocol. 4. Baud rate option. 5. It have two RS485 ports and has appropriative DVR port, it could control 255 DVR at most. 6. Key backlight. 7. DVR Control: image shift, record, stop, play, image zoom, catch screen, speed up, back, menu, alarm, etc. 8. It can control 99 DVR at most. 9.t supports 16 user account, 8 digit password.