... with America AD We have 2 big series of the matrix switch : 1)LH60-20V And LH60-70V could compatible ... macroinstruction with different function in group*Support composite control of matrix,frame processor, hard Disk Video*Recorder,decoder and dome ... .*Pass Ministry of Public Security detecting certification,ISO9000 quality system certification,CE certification.*Award as“quality,honesty,service AAA ...