It seems like there’s never as much time as you’d like to do sound check. That’s why UA844+SWB Antenna Distribution System lets you stretch the power of your antenna pairs, giving you more on-air channels in less setup time. So you can set it, forget it, and have more flexibility to make sure it all sounds perfect. UA844+xx replaces UA844xx. Antenna Splitter and Power Distribution System for receivers, 4-way active antenna splitter plus cascade port, different frequency versions available, external power supply.