Audio-Technica AT8539 Power ModulePower module AT8539 converts a wireless microphone into a wired model. HRS type 4 pin input connector is on one end of the power module, standard 3 pin XLR output connector is on the other for direct connection to a standard microphone input. Rugged steel construction provides durability and limits microphone pickup of mechanical humming sounds. Low cut filter is also included to minimize the pickup of unwanted low frequencies. Snap on belt clip is