... LH60- 30v matrix is economical, , samll-sized of matrix switcher System for CCTV surveillance systems. LH60- 30v matrix is economical, , samll- ... sized of matrix switcher System for CCTV surveillance systems. The LH60-30 system is capable of controlling a maximum of ... to control or operate the matrix switcher's menu and system setting, video and audio switcher, front equipment, set ...