ROWIN NANO Series LN-328 Tube Drive OVERDRIVE Tiny effect pedal - big sound! A very versatile overdrive pedal offering sounds of the classic Tube Screamer. Two modes, BOOST: High peak mode, boost up the bottom end, when increasing distortion by Drive knob, you will get more volume and a slight increase in high-mid range (around 3.5KHz). NORMAL: Low peak mode, color up extreme little to the original sound, very nice for clean boosting. The best thing about this boutique pedal is that unlike any similar counterparts, the Rowin LN-328 Tube Drive comes at a surprisingly affordable cost so that any guitarist can take advantage of its amazing sound. Compact, Tough Design This nano pedal is very small - less than 3 inches in length! Only 1.5 inches wide! With a small footprint like that, you will not have any problem finding a place on your pedal board for this pedal! Tiny doesn't mean weak - this series of effects are extremely tough! All metal construction, true bypass, and metal micro switches - this pedal is gig worthy. True Bypass Circuitry Hard to believe but these effects are designed with a 3PDT - true bypass, your tone is not altered when the pedal is not engaged. Specifications Full Metal Shell Volume/Gain/Tone controls Two Tone modes – Boost and Normal True Bypass 3DPT Switch Power Supply: 9V DC (Negative Center) - (Not Included) (38ma). NOTE that these pedals do not run on batteries, you must use an adapter like a BOSS (or a power supply).