Features: This reverb pedal is similar to analog the reverb effect of the spring of the amplifier, and the timbre is very natural. DWELL and MIX knobs for adjusting parameters of reverb effect. True bypass, and with LED light for indicating effects or bypass status. Aluminum alloy shell, durable and sturdy. Dual power supply choices (9V battery or DC 9V power adapter) for convenient usage.(not included)