D'Addario Nexxus 360 Rechargeable Guitar Tuner - Clip On Guitar Tuner - Acoustic Guitar Tuner - Electric Guitar Tuner - 24 Hours of Tuning Time per Charge - Rotates 360-degreesQuick Tuning: Tune your guitar or bass with ease with the Nexxus 360 Rechargeable Guitar Tuner; Featuring quick and accurate tuning, large screen, and strong clamp that rotates 360 degrees for a variety of viewing angles Rechargeable guitar tuner: enjoy 24 hours of guitar tuning time per charge without changing or buying batteries; simply plug the supplied USB cable into any usb power device as needed Extreme accuracy great accuracy with a wide