Professional 8channel UHF wireless microphone system Operates exclusively in the 500580MHz UHF band Includes 8 transmitters (handheld, lavalier, or headset depending on package) 8channel receiver with independent volume controls Up to ~90m operating range in open area Balanced and unbalanced audio outputs including mixed output LCD frequency displays with RF and AF signal indicators Dynamic and electret microphone options Up to 10 hours of continuous use with quality AA batteries Ideal for schools, churches, auditoriums, and corporate AV