Two channel Hum Eliminator(TM) equipped with 1/4 inch. ins/outs AND XLR ins/outs. Use any combination of 1/4 inch. and XLR ins/outs. Cold-rolled steel housing, passive design (no power required) & two-year warranty. Features include: · Simply plug the Hum Eliminator between the offending pieces of equipment to get rid of ground loop or cable related hum · Uses 1:1 isolation transformers to break loop antenna and balance audio lines · Also converts balanced and unbalanced signals · Two 1/4 inch. XLR channels in hand held box · Use any combination of 1/4 inch. or XLR ins/outs · 1/4 inch. smart jacks can accept any combination of mono or stereo plugs · Passive device (No power required) · Hang-able/resealable clear clamshell packaging · Cold-rolled steel housing, two-year warranty