Hate wasting batteries in your guitar/bass/instrument tuner? Then Fender has something for you: the Green Tuner! You crank it up and it works! The Green Tuner features a built-in microphone and has a 1/4" input, and it will display the chromatic pitch as well as indicate if the pitch is sharp or flat. It even has a built-in flashlight!
But the unique feature of this tuner is that the unit is hand cranked - no battery required! Just crank the knob, and you're good to go, ready to get you instrument perfectly in tune, and without wasting (or having to pay for) a single battery.
The most popular guitar interface of all time just got better, in the form of...