Hosa SLW-333 Passive Audio Switcher  1/4 TRS in to 3x 1/4" TRS PASSIVE FLEXIBILITY  Because this switcher is passive, it is configurable as a 1-In, 3-Out or 3-In, 1-Out operation for maximum versatility. CONVENIENT  This switcher is perfect for comparing your mix between multiple sets of monitors. NOISELESS - Noiseless switch for quick and easy comparisons. DURABILITY  Steel enclosure ensures rugged durability in your studio.