$34 off TASCAM TC-1S Solar Powered Tuner - Black

The TC-1S chromatic tuner has a built-in microphone as well as a 1/4" input for guitar and bass tuning. Its lightning-fast pitch detection is displayed on a wide bar graph display for instant feedback. Four display modes are available, including fine pitch display for 1-cent accuracy and strobe tuning animation. The tuner can be calibrated to an external source such as a piano or other hard-to-tune instrument.

The TC-1S charges its battery via a USB input or from a built-in bank of solar cells on the front panel allowing 6 hours of continuous use or an amazing 7 years of standby charge in darkness. It's wrapped in a shock-proof silicone cover that's available in multiple colors and keeps the Solar Tuner protected.