With five and a half hour battery life, 360 degree rotatable clip and four color display, the rechargeable GTA4500 sets a new standard for guitar-tuning precision and convenience. Accurate within plus/minus .5 cents, the GTA4500 features chromatic, guitar, bass, ukulele, a.0 Hz) detection range and 410Hz - 450Hz pitch range -- all in a compact 1.3" x ." x 3.7" unit with included 3.7V/0mAH power supply.