The Rechargeable Eclipse Headstock Tuner holds up to 24 hours of
tuning time per charge. With the included USB cable, simply plug
into any USB port to charge up. This new Eclipse Tuner still has
multi-swivel action, an extra bright LCD display, and auto
power-off, but now, you'll never have to change a battery again.
With this new rechargeability feature, on top of the full color
vertical display and easy to use clip-on functionality, Eclipse
provides excellent value to any player.