Built-in single wire multiswitch Receives three satellites signals - 99°, 101°, 103° degree satellites This is the SL3-SWM LNB designed with an integrated single wire multiswitch (SWM) which allows you to have multiple satellite Feeds at Once This LNB has 1 output for the Slimline dish from DIRECTV.The Slimline encompasses three LNBs to receive 99°, 101°, 103° degree satellites. Requires the SWM PI-21 21v Power Inserter.