Features: Professional wireless system receiver transmitter with microphone special for Saxophone, as well as for other wind instrument if the clip size available. Easy to fix on saxophone conveniently and firmly, protective rubber keeps your valuable sax from scratching. Reliable UHF, high signal-to-noise ratio, stable signal transmit. UHF frequency range: 630-690MHz. 6.35mm audio output plug, easy-to-read LCD display. Effective operating range up to 50m in open areas. Completed with configured 3.7V Li-ion batteries for the receiver, comes with adapter for charging. Ideal for stage performance, KTV, and home party use.