• The Ernie Ball Power Peg Pro USB-C features a universal head for all acoustic, bass, and electric guitar tuning machines. • It offers superior torque and is compatible with all tension requirements, from mandolins to ukuleles to vintage basses. • Rechargeable lithium-ion battery with USB-C charging cable included • Up to 80% faster than a manual winder • Works on all-electric, bass, and acoustic Instruments • Forward and reverse capabilities up to 200 rpm • Universal design • Comfortable grip • Locking safety switch • MFSKU P09626 • UPC 749699123798