high quality BATTERY OPERATED BELT-PACK: The transmitter operates on 2 AA batteries while the receiver base is USB powered. Additional features include digital LCD display in receiver base w/ compact tabletop design and convenient desktop audio mic controlCOMPLETE SET: Comes w/ receiver base, beltpack transmitter, headset and lavalier microphones, USB cable, 2 AA batteries. Can be used outdoor/indoor like a school classroom, church or at home for personal use. Perfect for PA, conference, performancesADJUSTABLE VOLUME CONTROL: The receiver and mic have power ON/OFF switch and the receiver has AF/RF audio signal indicators and frequency readout. Receiver is equipped w/ unbalanced audio output jack and XLR (3-pin) balanced audio input connectorUHF BAND: The Belt-Pack Microphone System features UHF signal audio transmission for an unsurpassed performance w/ high signal over noise ratio for clear, distortion free, crisp vocal and excellent sound reproduction unlike low grade VHF unitsSELECTABLE FREQUENCY: This 1 channel portable mic system features selectable frequency design w/ dual antenna extended wireless range for crisp vocal pickup. Enjoy cordless singing to karaoke music and mobility for energetic on stage performance