One output is main, the other is secondary. The King tailgater only locks onto one satellite at a time. The secondary output only receives channels from the particular satellite the main is looking at. So if you want to look at a certain station in the bedroom while the main is in standby, tune the main to that channel before turning it off.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder