VocoPro SILENTPA-in-Ear-Band Includes SILENT-PA-ST and 4 SILENT-PA-RX and IE-9 x 4Operates in 900Mhz Band, Free of TV Station Interference Utilizes UHF Technology for Greater Reliability and Operating Range than VHF or 2.4Ghz Body pack Receiver Has Two Dedicated Audio Outputs Stationary Transmitter Equipped with Mixing Function to Combine Microphone And Music Signals Lavaliere Microphone Included With Body pack Transmitter Body pack Receiver Powered by two (2x) AA, Alkaline OR rechargeable, Batteries Internal Recharge Circuit Allows Simultaneous Operation and Charging of Rechargeable Batteries on both