Wireless Microphones adopt latest transmission technology, making a stable and fast connection. Up to 30m transmission distance, 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,voice amplifiers, PA systems,truck speaker systems. Plug the receiver to a 6.35mm or 3.5mm Mic Jack of audio equipment, like , Audio/Voice amplifier, Speakers with Mic jack, PA system, Streaming multimedia equipment etc. Then turn on the receiver and wireless microphones, they pair to each other automatically. Even first-time users can get them started soomthly. 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 Less than 0.2%. High quality with outstanding audio performance. Rechargeable wireless microphone Plug and Play No setting Without 6xAA batteries Colour:Black Material:ABS Package Contents: 2 x Wireless Microphone 1 x Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.