Electric guitar preamp overdrive effect pedal for guitar players. 4 functional knobs(Gain/Volume/Bass/Treble) for adjust the performance of the overdrive effect. True bypass footswitch for switching between chorus effect and bypass status. LED light for indicating effects or bypass status. Full metal shell and compact size, durable and portable. Input: 1/4 inch monaural Jack Output: 1/4 inch monaural Jack Power Supply: DC 9V AC adapter (center minus plug)(not included) Item Size: 9.3 * 3.8 * 3.2cm / 3.7 * 1.5 * 1.3 inch Item Weight: 155g / 5.5oz Color: orange Material: zinc aluminum alloy Package Contents: 1 * Guitar Effect Pedal Note: Power Adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.