BOSS ME-25 Multi-effects Guitar Pedal Features: Powerful COSM amp models onboard, from classic to contemporaryClean to heavy presets — 6 categories with 10 sound variations per categoryFriendly user interface optimized for first timersSound library provides extensive collection of ready-to-use tones; simply choose a category and select a variationSounds can be instantly edited with the Drive, Tone, and Level knobs and Expression pedalSuper Stack button adds immensely heavy low end and punchPhrase Loop function with 38 seconds of recording timeFunctions as a USB audio interfaceBuilt-in auxiliary input for jamming along with external music devices (MP3/CD players, etc.)Runs on 6 AA batteries or AC adapterFree downloadable Librarian softwareCakewalk SONAR 8.5 LE software includedRequires PSA-120S power supply, not included The BOSS ME-25 is all the effects pedal you need — packed with sounds and ready to record to your computer via USB!Tech SpecsPedal Type Multi-FXNumber of Effects 31 EffectsAmp Modeling YesNumber of Models 10 Amp ModelsAnalog Inputs 1 x 1/4" Instrument, 1/8" Aux InDigital Inputs No Digital InputsOther Inputs No Other InputsAnalog Outputs 2 x 1/4", 1 x 1/4" Headphone OutDigital Outputs No Digital OutputsOther Outputs USBComputer Connection YesPower Supply Included NoBatteries 6 x AAHeight 2.875 inchesWidth 11.875 inchesDepth 7.5 inchesWeight 4 lbs. 4 oz.Manufacturer Part Number ME-25