The MXL-369 Patch Bay Module by Hosa Technology provides 3 channels of XLR throughput for any situation. It is ideal for making hard-to-reach, rear-panel microphone mixer inputs easier to reach. Hosa's Modular Patch Bays are designed for use as either stand-alone units or mounted in a PPP-000 Patch Bay Module Rack Frame as a component of a multi-function patch bay. The PPP-000 (sold separately) holds up to 4 modules and fits any 19-inch rack.