SAMSON MD1 Pro Mono Passive Direct Box, Shielded TransformerSignal Direct Box: It is the ideal solution for connecting unbalanced line-level signals from laptops, CD/MP3 players, and DJ mixers to professional, balanced equipmentPremium Material: Durable, roadworthy construction and two Mu-metal shielded transformers provide high-quality signal connection solutions for a variety of live sound and recording applicationsPrepared for the Unexpected: Housed in a 14-gauge steel chassis, the MCD2 Pro is built to withstand the abuse of the most demanding live toursSmooth Operation: The MCD2 Pro is perfect for converting unbalanced stereo line level or instrument signals from DJ Controllers, laptops, phones, and moreConnect Stereo Devices: The MCD2 Pro takes the pressure off of running live sound by providing a 1/8 inch (3.5mm) stereo, dual 1/4 inch, and RCA jacks for connecting almost any device to a sound system