?Add or Adjust Sound Effects? You can adjust the volume or sound effects via the buttons of connected audio equipment to meet your requirements. Amplify your voice to save your throat, spread them to your audience in a high-efficiency way. To get a more clear and full voice, we recommend puting the sound source above the top of microphone pickup. ?Clear and Pristine Voice Amplifier? Comes with high sensitivity professional cardioid dynamic capsule, which picks up clear, pure and full sound, for greater gain while simultaneously eliminating the annoying background noise and howling to some extent.No radiation, Anti-howling, Anti-jamming, constant frequency, Distortion <0.2%. High quality with outstanding audio performance. ?Plug and Play Super-easy to Use? Plug the UHF receiver to a 6.35mm or 3.5mm Mic Jack of audio equipment, like Singing machine, Audio/Voice amplifier, Speakers with Mic jack, PA system, Streaming multimedia equipment etc. Then turn on the receiver and wireless microphones, they will pair to each other automatically. Even first-time users can get them started soomthly. *Please note: They are not compatible with AUX jack. ?Rechargeable & Portable? Built-in rechargeable 1200mAh battery in both microphones and UHF receiver, enabling up to 9 hours of continuous working time on a single charge. The microphones come with a durable PU storage case with metal hook, which makes the microphones easy to carry and storage. ?Outstanding Audio Performance? XZL Wireless Microphones adopt latest UHF transmission technology, making a stable and fast connection. Up to 120 feet long-distance transmission , no delay and no cut-off, providing a larger flexibility in different scenes. Perfect for Karaoke singing, Presentation, Speech, Outdoor Activities, Wedding, Stage Performance, Conference, Church, Interview, Home party and more.