... Rocker,Large LCD display,PTZ and DVR control keyboard. Multi-protocol and customized protocol compatible, RS485 control PTZ and DVR Control Keyboard3D Rocker, ... Large LCD display, PTZ and DVR control keyboard.Multi-protocol and customized protocol compatible,RS485 control reach 1200m,1 ... can be modified in the menu of keyboard. 5). PTZ control and DVR control can be switched by a ...