☆Revol effects RT1 ☆ Electric Tuner ☆

☆Revol Effects Electric Tuner ☆
High Speed Automatic Tuning System RT1

□ Product Description: Attach this to the tuning pegs of your guitar or ukulele, and it automatically tunes your instrument just by strumming the strings!
The RT1 features a highly accurate automatic tuning function and is compatible with 6-string guitars and ukuleles.
Equipped with a high-speed gear that rotates 180 times per minute. It assists players with three modes: Auto, Semi-Auto, and Custom.
*For ukuleles, you can select between Auto and Semi-Auto modes.
□ Model Name: RT1
□ Brand Name: Revol Effects
□ Function: Automatic Tuning System
□ Compatible Instruments: 6-string guitar, ukulele
□ Price: ¥9,180

I started playing guitar as a hobby and saw on YouTube that this would make changing strings easier. However, I tried it a couple of times but couldn't get the hang of it, so it's been unused since. That's why I'm listing it for sale now.
The instruction manual is included. All the necessary parts from when I purchased it are still present, so it's a complete set!

Thank you for looking.