LTIBLOX is a consumer to pro interface. It converts input from consumer grade equipment (laptop computers, MP3 players, CD players) to a mic level balanced output. Gives operator volume control of the outgoing stereo signal. 3.5mm male input and XLR male output. Features Self-contained unit converts input from consumer grade equipment to a mic level balanced output Operator volume control of outgoing stereo signal 3.5mm male input and XLR male output Perfect size for your toolbox or even a shirt pocket Black powder coated aluminum chassis Hand soldered connectors Technical Specs Approximate size: 3 1/2" x 1 1/4" x 1" Some BLOX may be slightly larger due to LEDs, switches, knobs, etc. The following is a list of connectors on this item: (1) XLR (1) 3.5 (1) Potentiometer (1) DBT Male panel mount connector Male wired on 2 ft tail Volume control with knob Transformer