Handsfree microphone & belt mounted design allows you to use it in a variety of situations.Circuit design with maximum output of 7 W (45 m) to reach voice(may vary depending on the environment of use)The included dedicated hands-free microphone has a back-hold mechanism that stays securely on your head.Flexible arm allows you to adjust the position of the microphone freelyComes with a attachment belt that fits waist from 21.7 to 39.4 inches (55 to 100Battery-powered for no need to worry about the power cordEasy to operate with one knob to turn on and off the power and adjust the volume.