The 280 is an optical compressor that can go from light sustain to utterly smashed with the turn of a knob. Unlike faster non-optical circuits the 280 retains your high frequencies until you get into the more extreme settings. The 280 is ideal for chicken-pickin, added sustain for leads, or snappy-slappy funk rhythm. The 280 also has enough output to be used as a lead boost with added compressor sustain. And like all of the updated DOD pedal, it has a modern power jack, LED, light but strong aluminium chassis, and true bypass switching. General Specifications INPUT 1 x ¼instrument OUTPUT 1 x ¼CHASSIS MATERIAL All Metal POWER SUPPLY 9V Alkaline Dry Battery PS0913DC power supply Dimensions HEIGHT 2.25(5.71 cm) WIDTH 2.63(6.68 cm) LENGTH 4.68(11.88 cm) WEIGHT 0.62 lbs. (0.281 kg.)