Size: UDH-PLAY-8 UDHPLAY8 Eight Channel UHF/DSP Hybrid Body pack Wireless Microphone Package. Includes 8 Body Back Transmitters With 8 Headset Mics And 8 Lapel Mics; Operates In The 900 MHz Band, Which Is Free Of Tv Station Interference; All-In-One Wireless Mic-On-Ic Has A Pre-Amp, Compressor, And Expander Onboard. Do attempt to clean the unit with chemical solvents - this might damage the finish. Use a clean, dry cloth