This is the third iteration of a self-made digital multi-reverb using the FV-1 Reverb IC module. The number of built-in effects has been significantly increased from the previous "7 patterns" to "24 patterns (including Natural)". It also includes Over Drive, making it a Multi Effector, wouldn't you say...? It was built using an original designed printed circuit board. I think it can be used for various purposes such as guitar, bass, keyboards, etc. Please refer to the equipment introduction video for the built-in effects. https://youtu.be/BHL1yLAeP9Y An "Effect setting summary" describing the POT functions, etc., will be enclosed at the time of shipment. If there are any defects in the construction, please understand that it is a handmade product. //Specifications// Circuit: Effect section: Spin Semiconductor FV-1 Reverb IC Control section: Arduino NANO Every Function: Multi Reverb etc. Pots: MIX x 1, VOL x 1, POT0 x 1, POT1 x 1, POT2 x 1 Bypass: True bypass Size: 150 x 40 x 100 (excluding knobs, switches, and other protrusions) Power supply: DC9V (center minus) Type...Electric Guitar