Electro Harmonix Oceans 12 Reverb, Effects Pedal for Electric Guitar & Bass, Based on the Oceans 11 with even more reverbs and functionality, Two simultaneous, independent stereo reverb processors, 24 Presets and advanced I / Os that allow stereo in / out or mono send / return with pre and post reverb options, Tide Pedal Control for changing the stereo image, Lo-Fi Control and an input socket for external expression and 3-button foot switch control, Tails switch, Infinite reverb that can be played over with another reverb effect, 12 Types of reverb: Room, Spring, Plate, Reverse, Echo, Trem, Mod, Dyna, Auto-Inf, Shimmer, Polyphonic, Resonant, Controls: Tone / Tide, Time / Lo-Fi, Predelay / Send Level, FX Level / Inf Level, Reverb Type, Edit 1 & 2, Push buttons: Exp Mode, Moment, Tails, Function, LED: Effect on, Footswitch: Effect bypass, In L / Mono & In R / Return: 2x 6.3 mm jack, Out L / Mono & R / Send: 2x 6.3 mm jack, Exp Footswitch: 6.3 mm stereo jack, Power supply connection: barrel connector socket 5.5 x 2.1 mm, negative polarity inside, Power supply with a 9 V DC power adapter (included), Dimensions (W x D x H): 145 x 120 x 64 mm@+*Note:* Battery operation is not supported