Detail 01
Auto-on clip design
Flipping the tuner up powers it on; pushing it down powers it off.

Independent shopping perspective
The WST-645 is a rechargeable clip tuner designed to stay on an instrument's headstock. Flip it up to turn it on; push it down to power it off. Its five modes cover chromatic tuning, standard and compensated guitar tuning, bass, and ukulele. The compensated guitar mode is designed to make the guitar sound more harmonized and in tune while playing. It offers ±1 cent precision, A0–C8 range coverage, and a 360-minute battery life.


Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Flipping the tuner up powers it on; pushing it down powers it off.
Detail 02
The stated tuning precision is within one cent.
Detail 03
Its stated range runs from 27.5 Hz to 4186.0 Hz.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
Guitar, bass, and ukulele each have dedicated modes; chromatic mode is also included.
Battery life is specified as 360 minutes.
Yes. It includes both Guitar Standard and Guitar Compensated modes.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.