Fender Chromatic Green Tuner GT-1000 is the world’s first battery-less tuner and delivers an entirely new concept in guitar tuning. Fender Chromatic Green Tuner GT-1000 requires a few crank turns to get it up and running and then you're off. With Chromatic Green Tuner GT-1000 there's no need for expensive and wasteful batteries.
Recommended instructions for usage: The first time you use the GT-1000 Chromatic Green Tuner it’s a good idea to “prime” the power cells by turning the crank 20 times. Any time you use it after that, 5 to 10 turns will do the trick. There is NO need to charge the Fender Chromatic Green Tuner GT-1000 unless the lights on the tuner are dim. To conserve cell power, please turn the power off when not in use.