Features: 1.No Worry to Replace Batteries Any More. The rechargeable battery inside can be recharged 500 times. The tuner watches the power volume all the time and alerts with power volume sign on the screen. This rechargeable tuner can be quickly charged in just 1.5 hours with USB cableincluded in package for continuously use up to 5.5 hours. Saves energy with automatic power off after 3 minutes of no signal. And save your money, protect environment. 2.More Precisely Tuning Your Instruments. The new feature of cent indicator on the screen shows how many cents away from note in tune. More or less 3 cents which shows note in tune. So keep your instrument in tune just 3 cents and less away from in tune. 3.Use the Same Tuner for Multi Instruments. With highly sensitive piezo sensor inside, the tuner picks up vast range of frequencies, especially low frequency, and is fast accurate to tune instruments like acoustic electric classical and steel guitars, 7 and 12 strings guitars, ukuleles, mandolins, banjos and bass guitars. 4.Tune Your Instrument Under a Different Pitch. With great function of pitch calibration ranging from 430Hz to 450Hz, you can easily and fast to tune your instrument under a different pitch. 5.Easy to Use Under Any Lighting Conditions. Sharp and bright, colorful graphics allow you to easily see whether you39;re out or in tune from any angle in different light situations. Dual 360 degrees rotatable clip flexible for both right and left handed musician to read the screen from any angle. Package List: 1 x Guitar Tuner