Wren and Cuff Sonder - Unique Tremolo and Chorus combo pedal with individual rate and mix controls for each effect. The mix control goes all the way down to 0% so you can completely remove one or both effects from the mix. The Tremolo also features a tap tempo switch and a little secret. When you hold the tap tempo switch down it alternates the Tremolo LFO between a smooth sine wave (blue LED) and a choppy square wave (red LED). There is also a boost circuit to make your sound loud and proud!