Long Time: Built in Rechargeable Lithium Battery Enables, Easy to Use, Plug and Play, Good Anti Interference Performance and Stable Transmission. Digital Wireless Transmission Mode, Convenient and Free, Performance Space is No Longer Limited, Let You Enjoy the Release of Their Own Stage and Charm. Suitable for Multiple Occasions: Personal Entertainment, Team Performance, Teaching Speech, Solo Performance. Usage: Comes with a Clip for Mounting the mic the Sax, Which Helps Create High Level Audio . Compatible with Saxophone, Trumpet, Tuba, Trombone, Clarinet, Etc. Provides Wonderful Clear Sound Along with Other Electronic Music, Can Be Used in Service, Saxophone Recording, Live Performance, Etc. Frequency band range: 550.25-573.75MHz Receiver sensitivity: -88dB Channel: 20CH Total harmonic distortion: 0.2% Dynamic range: 110dB Output power: 10mW Frequency response: 20Hz-20KHz [3dB] Transmission distance: 30-50m Colour:Black Material:ABS Package Contents: 1 set * Saxophone Wireless Microphone 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.