The Rolls PM351 is a handy utility device designed to make the lives of studio and stage musicians a little easier. The PM351 is a personal monitor center that allows musicians and vocalists to monitor and control their own audio level against the entire mix. XLR microphone, 1/4" phone line and 1/4" phone instrument inputs are provided. Three volume controls provide control over microphone signal, instrument signal and line level signal. 1/4" phone out and XLR thru provide output to main mixers, recorders, etc. The rugged PM351 is a popular choice among drummers who need to monitor a click track. Overall the PM351 will prove suitable for any musician in recording and sound reinforcement scenarios.