KLIQ EcoTuner - USB Rechargeable Clip-On Digital Tuner (with included charging cable) - with Guitar, Ukulele, Violin, Bass & Chromatic Tuning Modes (also for Mandolin and Banjo) Automatic Digital Tuner  (Chromatic: Yes, Black)

Rechargeable Battery Inside—recharge with the supplied cord with USB port on your PC, mobile power bank, or charging adapter. No need to replace batteries, very environmentally friendly; taking 1.5 hours to fully recharge and can be used for 6 hours continuously. Fast & Accurate: Spend more time playing, and less time tuning. The EcoTuner's advanced Micro Processor and highly sensitive Piezo Sensor will ensure your instrument is accurately tuned in a flash. Super Bright Display: The largest color display on a rechargeable tuner allows you to easily see if you're flat, sharp, or dead-on from any angle. With 3 points of adjustment, you can position the screen in any way you like to put the tuner in perfect view. Easy to Use & Reliable: Turn it on, clip it on, and you're ready to tune. Since the tuner detects the pitches directly from your instruments' vibrations, ambient room noise will never get in the way. With a strong and durable design, this tuner was built to last. From light use by the music hobbyist to heavy abuse by the touring road warrior, the EcoTuner will get you in tune every time.