Guitar Tuner for Acoustic, Electric, Bass - Chromatic & Manual Settings - Lifetime Warranty - Clip On Digital Tuner, 360&ordm; Swiveling Head, Large Easy To Read Backlit Color Display To Tune In Any Light EASIER TO USE - Large, easy to read color display makes it easy to see if your note is flat, sharp or in tune. Display changes color when note is in tune. MORE RELIABLE - Feel good about your decision by going with the company that backs all their products with a LIFETIME GUARANTEE MORE ACCURATE - Accuracy within  0.5 Cent BATTERY INCLUDED - Tuner comes with (1) CR2032 battery MORE VERSATILE - Multiple settings allows you to use the same tuner for acoustic, electric, bass, ukulele and violin using standard or chromatic settings. Large frequency range from AO (27.5 HZ) to C8 (4186.00 HZ)