Channel Master CM 9537 Antenna Rotator Control Unit (CM9537) The Channel Master CM 9537 will replace any Channel Master manual controller or Radio Shack model 15-1225 rotator control unit. Purchase the CM 9537 to instantly upgrade to a remote control capable unit Automatic synchronization ensures pinpoint position accuracy Directional access control via TV channel number or digital compass location Unobtrusive control unit blends with any dcor Infra-red remote control