Nady DKW DUO HT B/D VHF Dual Wireless Handheld Microphone System – includes 2 microphones, AC adapter and audio cable – Easy setup – Karaoke, performance, presentation, public addressPerfect for all speakers, karaoke/recreational singers, DJs, auctioneers, aerobic instructors, and many other applicationsVery simple "plug-and-play" operationVHF (170-216MHz) operation for reliable, interference-free performance with 150+ feet typical operating range. Up to 200+ feet line-of-sightDual receiver for versatile single or simultaneous dual transmitter operationEconomical battery operated transmitters (2 AA battery per microphone)