DELUXE PREAMP GUITAR EFFECT PEDAL BOOST AND OVERDRIVE 2 in 1 Multi-functional guitar effect pedal: 2 effects pedals in 1 Unit: Boost, Overdrive. With smooth, round, balanced and low-to-medium gain overdrive effect. Independent switching between boost channel and overdrive channel Two models choose for boost. four models choose for overdrive With True Bypass ,Compact size, portable and durable. About the item: Power Supply: DC 9V AC adapter (center minus plug)(not included) Item Size: 11.5 * 6.5 * 3.5cm / 4.5 * 2.6 * 1.4in Item Weight: 265g / 9.3oz