You've painstakingly selected the perfect pedals to sculpt your tone. They're power hungry, so feed them well. Don't rely on mismatched batteries at multiple stages of wear. Get the power supply designed to support your tone, the Mini Iso-Brick. Requiring the space of a cell phone on your board, the Mini Iso Brick offers five fully isolated outputs that deliver clean, consistent, noise-free power to your pedals all gig long. It's designed to work with analog pedals, power-sucking digital pedals, and pedals with positive or negative ground requirements. How's that for inclusiveness? Power up to five 9V pedals or four 9V and one 18V, and since each has a dedicated output, there's no power sharing or voltage drops when multiple pedals are active! Stomp on with the Mini Iso-Brick!MXR Mini Iso-Brick Includes:AC adapter4 x barrel-to-barrel cables1 x Splitter cableMXR Mini Iso-Brick Features:Four 9V outputsOne 9V/18V switchable outletIncludes AC adapterIncludes supply to pedal cablesDimiutive footprint, superior powerMXR Mini Iso-Brick Specifications:Input 18V: At 2 Amps regulated supply (positive barrel negative center 5.5mm x 2.1mm plug) Outputs9-18V @ 800mA (switched)(4) 9V @ 300 mA(all positive barrel negative center 5.5mm x 2.1mm) MXR Mini Iso-Brick Pedal Power Supply.