Overview The PM50S is a small device that provides a mix of a stereo level signal to a microphone, and outputs the mix to two sets of headphone outputs. The unit features a monitor level control, microphone level control and pass-through jack, two XLR connectors, and a 1/4" TRS stereo monitor input headphone output jack. The external power adapter is included with Hosa's HPE-310 rugged molded cable connectors and a rugged outer jacket for long-term use. In the Box rolls PM50S Personal Monitor Amplifier Hosa Technology Stereo Phone 1 1/4-Inch TRS/4-Inch Female to Male Headphone Extension Cable - 10-Foot External Power Supply