Newly designed compact and lightweight housing for easy wearing. The panel integrates a backlit LCD and setup buttons for easy operation and view of all operating information. A lockable power switch prevents the power switch from accidental operation. In addition to the power switch and the mute button, functions such as input sensitivity, low frequency reduction, volume limit, power output, input polarization, and mute mode are also programmable. The world’s first ACT™ function provides precise and rapid frequency sync to the receiver. 6 switchable gain levels and the input polarization can be selected for matching various capsules. 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 rechargeable Li-ion battery, charging via USB Type-C with the foolproof and safe charging circuit. An optional slip-in charger (MP-800) is available. A belt clip for easy wearing.