It makes up of main board, wall-mount controller and remote control. It can control the fan, ... 1). It makes up of main board, wall-mount controller and remote control.2). There are wall-mount, ... floor-stand, ceiling-mount type indoor unit controller.3). Apply 8 bit and 4 bit microcomputer to ... more than 50m between main board and wall-mount controller.5). It can control the fan, valve, pump ...