Danelectro Cool Cat Tremolo.
Tremolo is an effect that automatically makes the volume of the input signal go up and down, quickly. So it sounds kind of watery/wobbly. Kind of a classic guitar effect like on that Link Wray song "Rumble". But also a good, old-school psychedelic effect for vocals (eg. "Crimson and Clover" by Tommy James), or synths.
Controls are Speed, Hard/Soft, and Depth.
Powered by 9V battery or 9V DC centre-negative power supply.
Donated by Tony Drent