The BOSS GT-1B gives bass players a massive range of pro tone-shaping power in a small and robust package. Backed by BOSS’s flagship sound engine, you have full access to a huge selection of bass-optimized amps and effects for stage and studio playing. The streamlined interface lets you dial in sounds fast, while the onboard control switch and expression pedal enable you to adjust multiple effects in real time. Compact, rugged, and battery powered, the GT-1B is the ultimate mobile tone companion for every bassist.BOSS GT-1B Includes:Owner's manualLeaflet "USING THE UNIT SAFELY"Alkaline battery (AA, LR6) x 4BOSS GT-1B Features:Flagship-class BOSS sound engine specially tuned for bassPro-level amps and effects in a light, compact floor unitEssential tools on board for optimizing your core bass toneIncludes advanced MDP effects for maximum musical expressionModern design with no hard edges enables safe transport in an instrument bagEasy Select and Easy Edit functions for quickly choosing and tweaking patchesFour AA batteries provide approximately seven hours of mobile playing timeOnboard control switch and expression pedal; footswitch/expression pedal jack and USBDownload pro patches and editor software for free at BOSS Tone CentralBOSS GT-1B Specifications:Sampling Frequency: 44.1 kHzAD Conversion: 24 bits + AF method*DA Conversion: 24 bitsEffects: 90 typesPatches: 99 (User) + 99 (Preset)Phrase Loop: 32 sec.Nominal Input Level: INPUT: -10 dBu, AUX IN: -20 dBuMaximum Input Level: INPUT: +7 dBu, AUX IN: 0 dBuInput Impedance: INPUT: 1 M ohm, AUX IN: 27 k ohmsNominal Output Level: OUTPUT (L/MONO, R): -10 dBu, PHONES: -10 dBuOutput Impedance: OUTPUT (L/MONO, R): 1 k ohm, PHONES: 44 ohmsRecommended Load Impedance: OUTPUT (L/MONO, R): 10 k ohms or greater, PHONES: 44 ohms or greaterControls:DOWN switch, UP switch CTL1 switchEASY SELECT button, EASY EDIT button, FX1/LIMITER button, OD/DS button, PREAMP button, FX2/MOD button, DELAY button, REVERB button, MEMORY EDIT button, EXIT button, ENTER button, MENU button1 knob, 2 knob, 3 knobExpression pedalDisplay: Graphic LCD (132 x 32 dots, backlit LCD)Connectors:INPUT jack, OUTPUT (L/MONO, R) jacks: 1/4-inch phone typeCTL2, 3/EXP2 jack: 1/4-inch TRS phone typeAUX IN jack: Stereo miniature phone typeUSB COMPUTER port: USB type BDC IN jackPower Supply: Alkaline battery (AA, LR6) x 4, AC adaptor (sold separately)Current Draw: 200 mAExpected battery life under continuous use: Alkaline: Approx. 7 hours*Options (sold separately):AC adaptor: PSA seriesFootswitch: FS-5U, FS-5L, FS-6, FS-7Expression Pedal: FV-500L, FV-500H, EV-30, Roland EV-5Dimensions (WxDxH): 12-1/16" x 6" x 2-1/4" (305 x 152 x 56 mm)Maximum height: 2-15/16" (74 mm)Weight (including battery): 2 lbs 14 oz (1.3 kg)Notes:AF method (Adaptive Focus method) is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.Battery Life will vary depending on the actual conditions of use. Boss GT-1B GT-1B Bass Effects Processor.