... joystick controlBasic Function:• Maximum cacade 16pcs sub-control keyboard• RS485 control bus,control 255 front end address and connect 128 devices ... on/off function• Speed dome camera infinitely variable speed control• LCD display Specification:ModelMY-4001B(2-Axis), MY-4001BT ... -duplex Cascade connection number16 sub-control at most,controller ID:0-15Joystick3-Axis(control:up,down,left,right,zoom) ...