No knob chorus pedal, internal controls

Chorus is the perfect effect for the set-and-forget no-knob platform, and we’re finally getting on board with the new BLACK HOLE chorus pedal. The BLACK HOLE uses an analog BBD chip to deliver those classic chorus sounds heard on countless records. Whether you want fast rotating speaker sounds or more subtle shimmery fullness, the BLACK HOLE will deliver!

2-1/2” x 3” x 1-5/8” tall (not including jacks and switch). External 9VDC power supply only - no room for battery.

https://www.henrettaengineering.com/Henretta_Engineering/Products.html