2 pcs guitar effect pedal: 1 pcs black & 1 pcs orange this d250x effect pedal is based on dod 250 preamp overdrive.2 functional knobs: gain and level controls; two models (d/m) to choose. on/ off led indicator light. true bypass allows your guitar tone to remain pristine even when the d250x is off. full metal shell and compact size, durable and portable. function knobs: gain: controls the amount of distortion, from just a press of grit to all-out grind. level: dials in some subtle body for "always on" performance or huge amounts of boost for boosting solos above a dense stage mix. with the gain all the way down, crank up the level to boost your sound and cut through during your solos. Distortion guitar effect pedal with true bypass switch. Mini size, durable zinc-aluminium alloy body. Supports classic rat distortion and T-turbo rat distortion. With tone(Filter), gain(Dist) and volume adjusting knobs. 100% analog signal path, ON/ OFF LED indicator light. Signal Input: 1/4 inch Monaural Jack Signal Output: 1/4 inch Monaural Jack Power Supply: DC 9V Item Size: 3.5 x 9 x 3cm / 1.4 x 3.5 x 1.2 inch Note: The power adapter is not included. Specifications: Input: 1/4 inch monaural Jack Output: 1/4 inch monaural Jack Power Jack: 9VDC, Negative Tips (Regulated recommended) Colour:Orange + black Material:metal + Zinc-aluminum alloy Size:9.2 x 3.8 x 3.6cm Package Contents: 2 * Guitar Effect Pedal