Ernie Ball Power Peg Pro String Winder (P04117) Description The Power Peg Pro is the latest addition to the motorized pegwinder family. Featuring a newly engineered wider head that fits all electric, bass and acoustic guitar tuning machines. Restring your instrument up to 80% faster than manual pegwinders. The Power Peg Pro is equipped with more torque working with all tension requirements from mandolins, ukuleles to vintage basses. With rechargeable lithium-ion battery and power adaptor included, buying batteries is now a thing of the past. Features: 80% faster than stringing by hand Comes with rechargeable battery and power adapter Fits 100% of all tuning keys Product Details: Brand: Ernie Ball Color: Black Instrument: Acoustic Guitar Item Weight: 14.7 ounces Product Dimensions: 8.25 x 2.75 x 11.25 inches Country of Origin: USA Item model number: P04117 Batteries: 1 CR2 batteries required. (included) Is Discontinued By Manufacturer: No Date First Available: January 17, 2013 Color Name: Black Battery type: Lithium Ion