Three great sounding reverb modes! Room: Authentic decay and warmth. Spring: Simulates a classic '60s surf-style spring reverb. Enjoys a compact size, further, the full metal case, and the special surface treating technology, making it has a long durability. Attractive lighting design. True bypass maximizes signal integrity when not in use. DC 9V adapter power supply. Product Features Two great sounding reverb modes : Room: Re-creates the acoustic properties of various room sizes with nice decay and warmth Spring: Produces classic 60’s surf reverb tones. True bypass maximizes signal integrity when not in use Compact size, full metal case, a special surface treating technology, offering long durability Attractive lighting design Requires DC 9V Adapter power supply