The SWM-8 (single-wire multiswitch, also knows as the SWM8 or SWiM) was designed to eliminate many of the issues involved in using house wiring in DIRECTV installs. Supports up to 8 DIRECTV satellite tuners. Die-cast housing is suitable for both indoor and outdoor use. Multi-Room Viewing (MRV). Allows any transponder from any DIRECTV satellite input to be independently selected and distributed via one of eight designated SWM output frequency channels. Provides AGC for the satellite input signal.