Shure PS9 Battery Eliminator replaces a standard 9V battery, allowing for the connection of the included Shure PS41 AC adaptor via a threaded DC connector. Shure PS9 is designed to work with P2R, P4R, P4HW, T1, T1G, LX1, UT1, ULX1, and MX1BP transmitters and receivers. PS9 also works with the Shure VP3 camera-mount receiver.