Introduction: Reflector Spring Reverb MP-311 is similar to alog the reverb effect of the spring of the amplifiers. Digital circuit design, and variety of reverberation effect adds musical color to you tone. Classic mini size, convenient and durable. Aluminum-alloy casing, stable and strong. Slip resistance bottom. LED indicator shows the working state. Classic Design: As you can see, Movall MP311 reverb pedal have a classic mini size, convenient and durable. True bypass switch lets your instrument’s sigl pass through a non-electronic bypass line when the effect is disengaged, feeding your amp with direct, ultered sigl from your instrument. Specifications: Input & Output Jack:1/4 inches mono audio jack. Power Supply: 9V DC (Negative in the center). Current Draw: 50mA.