Perfect for mixing a stereo or mono line-level Monitor signal with a mic level XLR microphone signal to a pair of 1/8 inch outputs, Rolls PM50s Personal Monitor Amplifier has a monitor level control, mic level control, mic pass through XLR jacks, two headphone output jacks, and a stereo TRS 1/4 inch monitor input jack. Rolls PM50S Personal Amp Features XLR Mic In and Pass Thru Ground Lift on XLR Thru Mono or Stereo 1/4 inch Monitor Input 1/4 inch and 1/8 inch Phone Outputs Lots of output level, it"s loud Includes AC Power Adapter An Effective solution for drummers who need to hear a click track, choir singers who need to hear themselves, etc.