The A/B Box allows you to route your instrument's signal to two separate output amp paths. Use it to switch between amps or run them both at the same time with different effect configurations so you can find your ultimate sound. Use the Thru jack to connect to a tuner, amp or other device that you want to receive a constant signal. The A/B Box comes in a heavy-duty die-cast housing with high quality jacks and switches. DESCRIPTION ? Routes instrument signal to two separate output paths ? Select between two separate signal paths or run both at the same time ? Thru jack allows you to connect to a tuner or amp that receives a constant signal from your guitar, unaffected by the A/B switches ? Output jacks are terminated to ground in bypass ? All switching is true hardwire CONTROLS OUTPUT A sends instrument signal to Amp A OUTPUT B sends instrument signal to Amp B THRU to tuner or sends constant signal to an amp INPUT receives instrument signal FOOTSWITCH A activates OUTPUT A FOOTSWITCH B activates OUTPUT B Power DC9V Center Negative DIRECTIONS ? Run a cable from your instrument to the A/B Box?s Input jack. ? OPTIONAL: If you want to connect a tuner or have an amp receive a constant signal from your instrument, run a cable to the A/B Box?s Thru jack. ? Run a cable from Amp A to the A/B Box?s Output A jack, and another from Amp B to the Output B jack. ? When both footswitches are depressed, both signal paths are active. Dimensions (W x D x H): 90 x 120 x 50 mm Note: Power supply not included. Please use the 9V power adapter whose polarity is negative center otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual (English) 1 * Year warranty through our store No Duty to Canada and USA FAST 'N FREE USA Shipping (typically about 4 days via USPS Ground Advantage ) Ships from Canada (depending on stock availability, may also ship from our Niagara Falls NY. location) *Just to be clear on DUTY, (regardless of what warns buyers of ) Canada and the USA have a trade agreement in place that allows US citizens to purchase/import up to $800 dollars per purchase in to the United States from Canada with NO Duty at all, State taxes are another story, some states charge a TAX some do not, BUT NO duty.