The Rolls PM50S Personal Monitor Amp is a unique device for monitoring one's self and program material at the same time. It has a monitor level control and a mic level control, mic pass through XLR jacks, 2 headphone-output jacks, and a 1/4" monitor-input jack. The PM50S amplifier is great for drummers who need to hear a click track, singers who need to hear themselves, and your other live sound needs. Includes adapter.