Powered by advanced BOSS technology, the ultra-versatile MD-500 delivers nearly any type of modulation effect a musician could want, and then some. Included are 28 different algorithms with intensive programming parameters, offering a nearly limitless sound palette to create with. And with class-defying 32-bit AD/DA, 32-bit floating point processing, and 96 kHz sampling rate throughout, you’ll enjoy pristine sound quality that extends beyond the capabilities of the very best studio hardware.Effects in the MD-500 include many new Prime types developed with cutting-edge BOSS tech, plus authentic sonic recreations of vintage classics like the CE-1 Chorus Ensemble, Roland Dimension D, ‘70s script phaser, ‘80s tri-chorus, and numerous others. With the ability to use two patches at once with A/B Simul mode, the MD-500 can likely cover all your mod needs with one convenient pedal. And by inserting drive pedals in the MD-500’s flexible external loop, it’s easy to place mod effects before, after, or around the loop as needed for the very best sound.BOSS MD-500 Includes:Owner's manualLeaflet "USING THE UNIT SAFELY"Alkaline battery (AA, LR6) x 4BOSS MD-500 Features:Studio-level sound with first-in-class 32-bit AD/DA, 32-bit floating point processing, and 96 kHz sampling rate12 modes and 28 modulation types, all with deep editing parametersClassic mod effects and BOSS originals, newly enhanced with cutting-edge technologyA/B Simul mode for using two patches at once, with your choice of series/parallel connection and mixed or split A/B outputInsert Loop function allows you to use mod effects before, after, or around drive pedalsGraphic LCD and intensive real-time control options297 onboard patch memories and hands-on controlsSelectable buffered-bypass or true-bypass operationMIDI I/O for interfacing with MIDI control devicesUSB-MIDI for connecting to the MD-500 Editor/Librarian or a DAWRuns on four AA-size batteries or PSA-series AC adapterBOSS MD-500 Specifications:Sampling Frequency: 96 kHzAD/DA Conversion: 32 bitsProcessing: 32-bit floating point12 Modes:CHORUSFLANGERPHASERCLASSIC VIBEVIBRATOTREMOLODIMENSIONRING MODROTARYFILTERSLICEROVERTONEMemory: 198 (99 banks x 2 [A] [B]), 297 (99 banks x 3 [A] [B] [C])Nominal Input Level: INPUT A/MONO, B: -10 dBuMaximum Input Level: INPUT A/MONO, B: +8 dBuInput Impedance: INPUT A/MONO, B: 1 M ohmNominal Output Level: OUTPUT A/MONO, B: -10 dBuMaximum Output Level: OUTPUT A/MONO, B: +8 dBuOutput Impedance: OUTPUT A/MONO, B: 2 k ohmsRecommended Load Impedance: OUTPUT A/MONO, B: 20 k ohms or greaterBypass: Buffered bypass or True bypass (with relays)Controls:A switch, B switch, TAP/CTL switchDOWN button, UP button, EXIT button, EDIT buttonMODE knob, RATE/VALUE knob, DEPTH knob, E.LEVEL knob, PARAM 1 knob, PARAM 2 knobDisplay: Graphic LCD (128 x 64 dots, backlit LCD)Connectors:INPUT (A/MONO, B) jacks, OUTPUT (A/MONO, B) jacks: 1/4" phone typeCTL 1,2/EXP jack: 1/4" TRS phone typeUSB COMPUTER port: USB type BMIDI (IN, OUT) connectorsDC IN jackPower Supply: Alkaline battery (AA, LR6) x 4, AC adapter (sold separately)Current Draw: 225 mAExpected battery life under continuous useAlkaline: Approx. 4.5 hours* These figures will vary depending on the actual conditions of use.Options (sold separately):AC adaptor: PSA-S seriesFootswitch: FS-5U, FS-5LDual Footswitch: FS-6, FS-7Expression Pedal: FV-500H, FV-500L, EV-30, Roland EV-5Dimensions (WxDxH): 6-3/4" x 5-7/16" x 2-1/2" (170 x 138 x 62 mm)Weight (including battery): 2 lbs 4 oz (1.0 kg) Boss MD-500 Modulation Pedal.