ATW-R2100a receiver and ATW-T210a UniPak® transmitter with AT829cW lavalier microphone. Audio-Technica’s second-generation 2000 Series is a 10-channel frequency-agile UHF wireless system designed to suit a variety of applications, including MI/live performance, fixed installation, public address, A/V rental houses and places of worship.Band I : 487.125 to 506.500 MHz