Effect pedal. Sound based on the legendary Tube Screamer overdrive pedal. JRC 4558 chip for original tasty tube overdriven tone. 100% Analog signal path. True Bypass footswitch for crystal-clear tone. Aluminum-alloy Die Cast case to withstand wear and tear. Heavy duty metal footswitch and on/off status LED. 4 Easy-to-read,readily accessible knobs. Warm, creamy, organic overdrive tone. Perfect choice for adding smooth, tube-like overdrive to any clean amp. Great booster as well, ideal for pushing an overdrive/distortion pedal (or an overdriven amp) over the edge. Great tone with low noise level. 2 Band EQ for flexible tone shaping. Dimensions 93mm (D) x 50mm (W) x 46.5 mm (H). Weight: 175 g.