Features: Excellent Performance--the receiver/transmitter adopts sturdy ABS shell and premium parts for durability, stable signal, strong anti-interference and 40m long transmission distance; condenser microphone reproduces smooth and clear sound. Rubber Clip Flexible Neck--soft rubber clip clamp the microphone securely on instrument, while not scratch instrument surface; bendable microphone neck allows easy adjustment for accurate pick-up. Auto Connection--both receiver and transmitter have the function of frequency modulation, which enables switch between 16 frequency points. Just press set key to reset and set up frequency point; they will auto-connect when in same frequency point. Convenient Portable Bag--the kit contains a receiver, a transmitter, a microphone, a cable for rechargeable battery, a store bag for easy carry(battery is not included). Wide Application--it can be installed on saxophone, trumpet, trombone, drum and more to amplify sound, suitable for concert, speech, stage performance, studio recording, etc.