The UHF Active Directional Antenna Power Distribution System by JXRYWF is designed for use with Shure wireless microphones. With a maximum range of 2200FT and operating on the UHF 400-970MHz band, this amplifier signals booster is compatible with brands like GTD, Sennheiser, and Audio-Technica. Made in China, this model (844) is a reliable and efficient solution for extending the range and improving the signal strength of your UHF wireless microphone system.