Newly designed compact and lightweight housing for easy wearing. The panel integrates a power switch and a backlit LCD for easy operation and clear view of all operating information. The world’s first ACT™ function provides precise and rapid frequency sync to the receiver. The high dynamic range audio input prevents saturation distortion and matches up low and high input impedance. Mute button and remote-control jack allow quick setting of MUTE function. The patented battery compartment can be inserted with two AA-type batteries or one Li-ion rechargeable battery, charging via USB Type-C with the foolproof and safe charging circuit. A belt clip for easy wearing.