The BOSS JB-2 Angry Driver guitar pedal features three dual-concentric knobs that provide independent drive, tone, and level control for each overdrive type. Via a six-position mode selector, you can use each overdrive independently, or combine them together in series and parallel configurations. With the ability to blend the Blues Driver’s famously expressive low-to-mid gain tones with the Angry Charlie’s aggressive rock voice in any combination, the JB-2 Angry Driver delivers unmatched range and versatility from a single overdrive pedal.BOSS JB-2 Includes:Owner's ManualLeaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information")Alkaline battery (9 V, 6LR61)BOSS JB-2 Features:All-new overdrive pedal with massive tonal range, jointly developed by BOSS and JHS PedalsCombines the voices of the BD-2 Blues Driver from BOSS and Angry Charlie from JHS PedalsThree dual-concentric knobs provide independent drive, tone, and level control for each overdrive typeMode selector for choosing individual overdrive types, two series connections for stacking, or parallel connection for unique new soundsAlso includes a mode for toggling between BOSS and JHS overdrives with the built-in pedal switchRemote switch jack for controlling pedal modes and bypass from an optional footswitch or effects switching systemMulti-color LED indicator shows BOSS mode (blue), JHS mode (red), and both together (purple)BOSS five-year warrantyBOSS JB-2 Specifications:Nominal Input Level: -20 dBuInput Impedance: 1 M ohmNominal Output Level: -20 dBuOutput Impedance: 1 k ohmRecommended Load Impedance: 10 k ohms or greaterControls:Pedal switchMODE knob, DRIVE knob, TONE knob, LEVEL knobIndicator: CHECK indicator (Serves also as battery check indicator)Connectors: INPUT jack, OUTPUT jack, REMOTE jack, AC adaptor jack (DC 9 V)Power Supply:Alkaline battery (9 V, 6LR61) or Carbon-zinc battery (9 V, 6F22)AC adaptor (sold separately)Current Draw: 50 mAExpected battery life under continuous use:Alkaline: Approx. 9.5 hoursCarbon: Approx. 2.5 hours* These figures will vary depending on the actual conditions of use.Option (sold separately)AC adaptor (PSA series)Foot switch: FS-5L, FS-6, FS-7Dimensions (WxDxH): 2-7/8" x 5-1/8" x 2-3/8" (73 x 129 x 59 mm)Weight (including battery): 1 lb (440 g) Boss JB-2 Angry Drive Guitar Pedal.