Rechargeable via USB;Battery 3.7 V / 110 mAh;High-contrast 4-colour LCD-Display;Tuning-Mode chromatic/guitar/bass/ukulele/violin;360 degree rotatable;Automatic switch off after 3 minutes;Calibration 430-450 Hz;Accuracy +/- 0.5 Cent;Detection range A0 (27.5Hz) – C8 (4186Hz);Incl. USB-cable;