The YAMAHA SPX50D is a digital sound processor with excellent features for sound quality adjustment. It's a legendary Yamaha model from the 80s and 90s, known for being used by famous artists like Tomoyasu Hotei. - Brand: YAMAHA - Model: SPX50D - Country of Manufacture: Japan - Power Supply: 100V 50/60Hz - Power Consumption: 13W - Input Level Adjustment: 0-10 - Connection Terminals: INSERT, OUT, INPUT This unit has been carefully stored after purchase and has seen very little use. The exterior has no noticeable scratches and is in very clean condition. Power-on, effects, and switch operations have been confirmed. It produces good sound without noise or crackling. The internal battery has been replaced with a new one. There are no warnings due to low battery voltage, which is common with the SPX50D, and settings are saved without issue.