G-MARK P3 Whole Metal Ultra-Compact Personal In-Ear Monitor Amplifier Portable Beltpack Headphone Amplifier With Stereo/Mono Switch, Volume Control, Use for Musicians, DJ, Stage Music Monitoring UHF Karaoke Mic With Lithium Battery Receiver it is about the size

it is about the size of a small hand's palm

The LED indicator lights and rotary adjustment knobs offer convenience and control

the receiver can observe the transmitter battery working status quickly11

Professional Four-Channel: Four-Channel UHF Cordless Microphone Receiver and High Sensitivity Unidirectional Handheld Microphone

Wired Microphone*1

G-MARK P3 Whole Metal Ultra-Compact Personal In-Ear Monitor Amplifier Portable Beltpack Headphone Amplifier With Stereo/Mono Switch, Volume Control, Use for Musicians, DJ, Stage Music Monitoring UHF Karaoke Mic With Lithium Battery Receiver it is about the sizeHigh PowerHigh power of headphone amplifier suited for high impedance professional headphone, make sure there is enough volume in noisy surroundings. (Don't support microphone) Professional In ear MonitorOutstanding technical, sonic characteristics, high audio reproduction and no audio rendering for professional personal in ear monitor. Whether you are a keyboardist, drummer, guitarist or bassist, P3 can provide you with the best headphone amplifier