The MSR remote control for the PreSonus Firestudio gives volume, dim, mute mono, and speaker switching as well as the ability to switch between surround and stereo mode.

The MSR (Monitor Station Remote) is a complete surround capable desktop remote control delivering the ability to switch between Track, Mix and Surround modes, as well as talkback, dim, mute, mono and dual headphone amplifiers. With the MSR, Track Mode delivers nine stereo mixes for monitoring in headphones during tracking. Mix Mode allows the user to switch between three sets of stereo monitors, and Surround Mode enables 5.1 surround control for mixing in surround sound.

In good condition, other than the buttons having yellowed with age.