Dual wireless microphone system with selectable frequency, which uses frequency tuning technology to provide distortion-free audio transmission The device is equipped with anti-interference feature, which increases the anti-interference ability and reduces the interference between each channel Easy to use device, no installation required Each microphone picks up sound seamlessly and transmits it effortlessly to deliver clear, powerful sound that's even better than the real thing. The device covers a communication area of 80 meters between the device and the microphone The receiver and transmitter are powered by electricity The microphones are powered by batteries, each microphone requires two batteries. 5 Perfect for indoor or outdoor, karaoke, party, meeting, wedding, speeches, schools, opening ceremonies, promotion, DJ or small live performance on stage Product colors: Available in black