BUILT FOR LIVE: The dual wireless karaoke microphone for adults with the 48kHz/24Bit UHF digital circuitry transmits encrypted signals to avoid signal crosstalk and deliver delay-free accurate sound. 2x15 UHF tunable frequencies in 902 - 928MHz fend against crowded spectrum conditions, available for simultaneous multiset hookup. The bodypack connecting the headset/lapel mic via the 3-pin mini XLR jack and the cardioid dynamic singing microphone render liberate performance and pure sound. GOOD TO GO: 1500mAh battery of the mini receiver and 550mAh battery of bodypack transmitter via universal USB Type-C charging port for long-lasting battery life. The autotune microphone and bodypack feature a one-tap frequency selection and transmitter mute function for convenience and smooth performance. Just turn on the wireless microphone karaoke system, and you are good to go with the 160 - 200ft line-of-sight range. Please keep the antenna upward and avoid metal/glass for a better range. POR