1.Rechargeable Wireless Microphones and Receiver: No need to purchase additional AA batteries.The microphone and receiver are both built-in rechargeable battery. 2.Easy to Use: Both the volume and the channel change are done directly through the microphone. 3.Great Sound Quality: The wireless microphone provide a clear and crisp with no distortions whatsoever sound quality. and can be heard clearly at both indoor or outdoor parties with ease.great for home karaoke, performance, doing duets and public speaking. 4.Operating Range: Maximum 50m (the open area) to freely move around during performances Reliable signal and no worried about the sound will be cut in and out during use.Use it for a multitude of events, such as family karaoke, church gatherings, weddings, meetings, and presentations. Colour:Blue Material:ABS+Alloy Package Contents: 2x microphones 1x receiver 2x rechargeable batteries (18650-3.7V) 2x cotton tips 1x charging cable 2x anti-slip rings 1x 3.5mm adapter 1x English instruction manual 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.