3D PTZ Keyboard Support PELCO matrix.

PTZ keyboard IGV-KB20 1: Support PELCO matrix. 2: Support 4 keyboards linkage, each keyboard can support 32 domes at most. 3: Expediently and comfortably use according to ergonomics design Features: Support PELCO matrix. Support 4 keyboards linkage, each keyboard can support 32 domes at most. Expediently and comfortably use according to ergonomics design. LCD with back-light can display command menu, protocol, current camera ID, output display ID and joystick status. Three