English Menu, Password function, Support 4 keyboard linkage, each keyboard can support 64pcs domes at most. Expendiently and comfortably use according to ergonomics design. LCD with back-light can display command menu, protocol, current camera ID, output minitor ID. Three axis joystick can control speed of pan/tilt and zoom in/out. Built-in multi-protocol, baud rate can be selected. Support DVR protocol and all kinds of matrix. Support all shortcut keys of dome. Alarm trigger and alarm action can be set