B-Stock, One Control A+B switch and true bypass looper for effects pedals; footswitches provide control over two independent send/return loops, can be used as tuner output / mute switch, 2x DC barrel output (2.1 x 5.5 mm) to connect power through, true bypass, Loop 1 footswitch, Loop 2 footswitch, status LEDs, metal housing, 6.3 mm mono in / output jacks, 6.3 mm mono send / return jacks, power supply via optional 9V DC adapter, 2.1 x 5.5 mm barrel plug, polarity (-) center, passive operation without power supply possible (status LEDs and DC barrel outputs without function), battery operation not supported, current draw 4 mA, dimensions (L x W x H) 65 x 120 x 46 mm / 2.56" x 4.72" x 1.81", weight 200 g / 0.44 lbs, B-Stock with full warranty, may have slight traces of use