... keybaord 4.CE,Rohs certification 64inputs 16 outputs CCTV matrix switcher We provide 2U/4U/8U Matrix ... the appointed monitor, even can operate and control the DVR directly, such as playback, menu set up, ... 3-Axis keyboard that can control matrix and DVR meantimeSet DVR video input channel separatelyCan be connected 16 ... lightning surge protection measures and anti- interference CCTV DVR matrix switcher