Check the listing for details. Rolls Wall Plate Direct Box. Condition: New. Listed at 89.00 USD. Product highlightsXLR balanced input jack for connecting a microphone 3.5mm TRS jack for connecting an unbalanced stereo source rotating input level knob adjusts both inputs pluggable barrier strip balanced output frequency response: 50-20,00 Hz (±3dB) installs in a standard single-gang junction box, not included fits a standard Decora wall plate, not included 1-1/2"W x 4-1/8"H x 1-1/2"D weight: 4 oz. warranty: 1 year What's in the boxWall interface 3-Pin Euroblock (Phoenix) connector (pre-attached to back of interface) Instruction sheet About this itemWritten by Crutchfield's Eric Angevine[experience.getstarted] This in-wall interface allows you to connect a microphone and anunbalanced stereo source, like a phone or consumer CD player, to your commercial audio system that passes balanced signals. The front panel includes a 3.5mm unbalanced input and an XLR balanced input, with a level control knob. A pluggable balanced barrier strip output is included.