Effects: Level, Sensitivity, Tone knobs allow you to dial in your sound. The comp tone is round and , full of musicality. Two modes: full pint and half pint compression. Meterial: Made of high quality zinc , durable and strong. Classic mini size can save a lot of space on pedal board. True Byapass switch lets your instrument's signal pass through a non-electronic bypass line when the effect is disengaged. LED indicator shows the working state. Note: note this pedal cannot powered by batteries. Need a DC with negative in the center to power up. buy it separately at Music . you will enjoy the using this Guitar Pedal. Colour:yellow :Zinc Size:95 x 44 x 48mm Package Contents: 1 x Guitar Pedal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.