Uniquely designed to "liberate" active acoustic musicians, the WI-800 Single-Channel System offers wireless transmission of all manner instruments from woodwind to brass. The WI-800 adopts PLL (Phase-locked loops) synchronization, auto mute and other advanced technologies and features a LEVEL switch (-6/0/+10), RF/AF indicators and SENSITIVITY knobs to offer an intuitive, worry-free and plug-n'-play user experience and make every performance excellent and perfect. Furthermore, the frequency auto-scan function allows the connection between the transmitter and the receiver is established via the 16 preset frequencies, just button pressing is required, in a snap of fingers. The included battery-powered beltpack transmitters features a MUTE button, offering the maximum stage management quality and flexibility during the event. And the microphone delivers excellent sound quality for applications where the microphone is required be virtually invisible, such as musical instruments like acoustic guitar, violin, saxophone, percussion and more.