Home KTV mixing microphone: sing if you want, and play with life. Adjustable reverberation, KTV atmosphere is full. Double-click to cancel the original-sound, and the original-song cuts the accompaniment. Create a family KTV, theater-level sound effects, and homebodies can also enjoy K-song experience. 7 kinds of sound effects are interesting: 7 kinds of sound effects, easy to switch, the goddess magic sound changes at . Wireless microphone: Operating voltage: 3.7V B channel frequency: 572.5-586.5MHz Signal to noise ratio: equal 80dB Battery capacity: 3.7V 400mAh mit power: 16dBm Operating current: 90MA A channel frequency: 552.5-556.5MHz Reverberator: Working voltage: DC5V Input current: 1.5A Receiving sensitivity: less than equal 106dB Working current: 220mA Communication distance: 12M Colour:Light Green Material:Plastic Package Contents: 2 * Microphones 1 * Reverb 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.