GTD Audio U-504L VHF Wireless Microphone System with 4 Headset, Lavalier (Lapel) mics 4 Channel Receiver with 4 Belt pack transmitters & lavalier, headset Mics Individual volume controls on each Channel 230 feet ( 65 Meters ) Range One 1/4" Mixed output and Four XLR Individual outputs Available Frequencies: 520Mhz-570Mhz