3 Modes lavalier microphone has 3 modes of Noise Reduction, Mute and Reverb. The Reverb function enhances the stereo sound (double-click the switch button to turn it on), and the Mute function provides temporary mute in case of emergency (click the switch button to turn it on). 2 Years Waranty 1) 90-Day 100% Refund Guarante. 2) 2 Years Free Replacement or Waranty. If you have any questions, please feel free to contact us, we will solve it for you within 24 hours. 2 Microphones and 1 Receiver wireless microphone can be shared by 2 people to record at the same time, no interference, no delay, and no need to transfer the receiver. You can also use either microphone alone and the other as a backup Packing List The package includes 2 Microphones, 1 Receiver, 1 Type-C to Lightning Adapter, 1 Type-C to USB-A Adapter, 2 Type-C Monitor Earphones, 1 Portable Store Bag, 2 Extra Anti-spray Sponge, 2 Extra Clip, 1 Type-C Charging Cable, 1 User Manual. 8 h Working Time The portable lapel microphone transmitter has a built-in rechargeable battery and a low-power chip for up to 8 hours of working time, and a full charge takes only 1.5 hours. The receiver is powered by your device with a charging port to charge your mobile phone while recording videos, no more low battery panic! NOTE: The microphone receiver does not need to be charged.