Tech Portal : (choose receiver model) : (choose remote model) : IR/UHF/UHF Pro Text

The IR remote uses infrared light to control the receiver and has a maximum range of 40 feet. You must point the remote directly at the receiver, with no solid objects in the way. The IR specific remotes do not have a UHF logo on the bottom. All IR/UHF remotes also send IR commands in SAT mode.
The UHF remote sends ultra-high frequency radio signals to a UHF antenna connected to the back panel of UHF compatible receivers. With UHF compatible receivers, the signals will travel through solid objects and allow you to use the remote to control the receiver from another room, or even from another floor in the building, to a possible maximum of 100 feet away from the receiver. To check if your receiver is UHF compatible, look for the UHF Remote Antenna connection on the back panel of the receiver. The UHF remotes have a UHF logo on the bottom. All IR/UHF remotes also send IR commands in SAT mode and only IR commands in all other modes.
The UHF antenna must be attached to the receiver back panel UHF Remote Antenna connection in order to use the UHF remote control. Because the UHF remote operates from such a long range, the receiver may respond to signals from other nearby remote controls. To handle this problem, see the Addressing to the Receiver procedure. Because the UHF antenna is sensitive, it may pick up other UHF signals, interfering with the operation of the remote.
The UHF Pro remote sends radio signals to the UHF remote antenna connected to the back panel of UHF Pro compatible receivers. These remotes operate the receiver similar to the standard UHF remotes but does not send IR to the receiver. UHF Pro remotes have an extended range of 200' to operate the receiver and will not operate non-UHF Pro receivers at this time.