Since 1988 guitarists have looked to the compact and rugged BOSS ME series pedals to drive their sound, and the new ME-90 proves why. Constant innovation, attention to detail, and reverence for the past come together to make the ME-90 the most advanced Multi-effects on the market, from the company that defined that market. Exceptional audio quality from 24-bit AD/DA and 32-bit floating point processing and intuitive tactile control allow you to quickly craft the sound in your head so you can get back to playing. Real-time control allows you to hear the changes as you make them like a classic stompbox without the hassle of patch cords, hook and loop tape, and multi-power supplies. Premium BOSS amps and effects include eleven onboard AIRD amp models and 60 different effects derived from the flagship GT-1000, plus there are 36 ready-to-play preset patches to get you started. And there are another 36 open patches for storing user setups. A dedicated amp section and seven simultaneous effect categories combined with the BOSS Tone Studio offer endless options for creating the ideal sound for every song. It's a tone-tweaker's paradise. You can even load up to three speaker IRs using the ME-90 IR Loader software for Windows or Mac. A multi-function expression pedal with toe switch gives you control over volume, wah, and a host of other variable parameters. The ME90's output can be optimized for use with a guitar amp (combo or head) or direct connection to a full-range PA system, so you always get the sound you want. And if you have some favorite boxes that you can't play without, the ME-90 welcomes external pedals via a rear panel send and return effects loop. Thousands of guitarists. Over 35 years. Find out why with the ME-90.Boss ME-90 Includes:STARTUP GUIDEAlkaline battery (AA, LR6) x 4Leaflet "USING THE UNIT SAFELY"Boss ME-90 Features:All-in-one guitar processor with premium BOSS amps and effectsEasy stompbox-style sound creation with an intuitive knob-based interfaceSuperior sound quality with 24-bit AD/DA, 32-bit floating-point processing, and 48 kHz sampling rateEleven onboard AIRD amp models and 60 different effects derived from the flagship GT-1000Dedicated amp section plus seven simultaneous effect categories with multiple types to choose fromEdit parameters, swap out amp and effect types, and more with BOSS Tone StudioEight multi-function footswitches and a newly redesigned expression pedal with toe switch36 ready-to-play preset patches and 36 user patches for storing custom setupsManual mode for pedalboard-style operation and Memory mode for switching complete patch setupsRear-panel switch to optimize the audio outputs for a guitar amp or full-range sound systemLoad up to three user speaker IRs with the ME-90 IR Loader software for Windows/macOSSend/return loop for external pedalsLight, durable design and colorful status LEDsPowered via four AA batteries or optional AC adaptorUSB-C connector for communicating with BOSS Tone Studio and audio recording/playback with music production softwareDownload and share ME-90 Livesets at BOSS Tone ExchangeOptional Bluetooth® Audio MIDI Dual Adapter allows you to edit sounds and stream audio from an iOS or Android mobile deviceBoss ME-90 Specifications:Sampling Frequency: 48 kHzAD Conversion24 bits + AF methodAF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.DA Conversion: 24 bitsProcessing: 32-bit floating pointEffects: 97 TypesMemories: 36 (User) + 36 (Preset)Phrase Loop: 38 sec. (MONO)Tuner Internal Detection: +/-0.1 centNominal Input LevelINPUT: -10 dBuRETURN: -10 dBuMaximum Input LevelINPUT: +7 dBuRETURN: +7 dBuInput ImpedanceINPUT: 1 M ohmRETURN: 1 M ohmNominal Output LevelOUTPUT (L/MONO, R): -10 dBuPHONES: -10 dBuSEND: -10 dBuOutput ImpedanceOUTPUT (L/MONO, R): 1 k ohmPHONES: 44 ohmsSEND: 1 k ohmRecommended Load ImpedanceOUTPUT (L/MONO, R): 10 k ohms or greaterPHONES: 44 ohms or greaterSEND: 10 k ohms or greaterControlsBANK DOWN/AMP switch, BANK UP/EQ switch, CTL/REV switch,MEMORY/MANUAL switch, 1/COMP switch, 2/OD/DS switch,3/MOD switch, 4/DELAY switch, PEDAL FX switch,Gt. AMP/LINE switch, POWER switch,EXIT button, WRITE button, CTL button, EDIT button,PREAMP TYPE knob, GAIN knob, BASS knob, MIDDLE knob,TREBLE knob, LEVEL knob,REVERB knob,COMP/FX1 TYPE knob, SUSTAIN/SENS/-1OCT knob,ATTACK/TONE/-2OCT/DEPTH knob, LEVEL/PEAK/DIRECT knob,OD/DS TYPE knob, DRIVE knob, TONE knob, LEVEL knob,MOD TYPE knob, RATE/KEY knob, DEPTH/HARMONY knob,E.LEVEL/RESONANCE knob,DELAY TYPE knob, TIME knob, FEEDBACK knob, E.LEVEL knob,OUTPUT LEVEL knob, PEDAL FX TYPE knob,PEDAL FX pedalDisplay: 7 segments, 2 characters (LED)ConnectorsINPUT jack, OUTPUT (L/MONO, R) jacks, SEND jack, RETURN jack: 1/4-inch phone typePHONES jack: Stereo miniature phone typeUSB COMPUTER port: USB Type-C(R)Bluetooth ADAPTOR connector: Dedicated connectorDC IN jackPower SupplyAlkaline battery .