This pedal recreates the warm, reverberant sound of the spring reverb found in the blackface amps, which are most familiar to guitarists. High-quality parts such as the OP275 op-amp and DALE resistors are used, and the unit is hand-assembled to produce a clear, high-quality sound. This simple, authentic spring reverb is packed into a compact size. ■SPEC Size: Approx. 47(W) * 97(D) * 50(H) mm Power: DC9V center negative (battery operation not possible) Operation has not been confirmed. Everything in the photos is included. We will ship within 1-2 days. Returns are not accepted. Thank you.