Product model:DV920
Features：
1.Intelligent Keyboard mainly used in the field of controlling DVR, matrix, PTZ, receiver or other terminal device.
2.RS485 communication, controlling up to 255 PTZ or 99 DVR. 
3.For pan/title or camera control, it supports ZOOM, IRIS, FOCUS, PRESET/TOUR, FUNCTION, PATTEN controlling and parameters setting.
4.For DVR control, it supports PLAY,STOP,RECODER,DISPLAY,UP,DOWN,RIGHT,LEFT,DVR1,DVR9/16,DVR4,SEARCH,ZOOM+,ZOOM-,FEW,FF,REVERSE,PLAY,PAUSE,SEQ,DVR-TV,FREEEZE,CATCH,ALARM and so on.

Parameters：
Adapter                AC220V or AC110V
Power Supply            DC9V/5W
In/Communication    RS485
Out/Communication    RS485 
Distance           1200m
ID                    255/1024(based on different protocol)
LCD                    LCD (dot-matrix)
Work Temperature    -10°～50°
Humidity            90%
Size（mm）         390 x145 x 160
Weight（Kg）            2.37