Best performance with JBL PartyBox speakers: Use JBL wireless mics on any speaker with a mic input, but for the best experience, add-on to any of the JBL PartyBox speakers | Rechargeable UHF dual channel wireless receiver: There’s no need to fly solo, unless you want to take center stage of course. Connect two wireless microphones together and hear both voices blended perfectly through the speaker for up to 6 hours of playtime | Plug and Play: When you want to be heard, you want to be heard now. The JBL wireless mics have a super simple setup. Just turn on the receiver and wireless microphone and you’re good to go instantly | Microphones come with replaceable AA batteries: JBL wireless mics come with easy replaceable AA batteries, so get your groove on all night long | High vocal quality and JBL Original Pro Sound: The crystal clear clarity from the JBL wireless mics means no jamming, delay or distortion. Your voice will sound on point, with the backing of incredible JBL Original Pro Sound