Wide CompatibleWith 6.35mm receiver, the receiver automatically scans the microphone, just plug the receiver into the MIC interface and turn on the microphone switch. Compatible with speakers, mixers or amplifiers with a MIC port. (Note: AUX, mobile phone, tablet, PC, Bluetooth speakers are not supported)No DelayUsing ultra-high frequency (UHF) and solid metal, the signal is more stable, no delay and noise, anti-whistling, anti-interference, and clearer. These wireless microphones support volume, treble, bass and echo adjustment and are suitable for churches, outdoor weddings, home entertainment, small DJ KJ stages, birthday parties, conferences, classrooms, small karaoke parties, events and more.[Multi-frequency points] Each microphone has 50 frequency points, a total of 100 groups. When FM is turned on, you need to press and hold the volume adjustment key for a while. When the screen displays the number of channels, press the volume up and down to adjust the frequency.Distance up to 50m/165ft The effective transmission distance is up to 50m/165ft and because the microphone has an adjustment button, you can adjust the sound anytime and anywhere without having to go to the playback device to adjust the sound.6 Hours WorkingThe receiver is powered by a rechargeable battery with a capacity of up to 1200mAh, charge for 3 hours and work for 6 hours. The microphone is powered by AA batteries (included). The microphone's LED screen will display the battery level and frequency band.