Versatile and authentic all-analog tremolo pedal. Classic 3-knob design allows you to control speed and depth. Seamlessly morph between soft and hard LFO styles. True bypass for ultimate signal integrity. "Built-like-a-tank" metal chassis. Runs on 9 V battery or the PSU-SB DC power supply (not included). Tremolo is one of the most subtle and easy-to-use modulation effects, and should be part of any good amp – but sadly, that’s not always the case. CHOKA TREMOLO’s brings this sweet vibe to your setup with an intuitive 3-knob layout that lets you crank out fast waves that can either cut deep or shallow furrows across your tone, or build slow tides that ebb and flow with just the right amount of white-capped, tube-laden goodness to produce the ultimately-sublime surf tone.