Amazon.com: Guitar Tuner Pedal with True Bypass - Mini HD Color Screen Guitar Tuner Pedal with Pitch Calibration and Flat Tuning, Guitar tuner for Electric Guitar | Bass | String Instrument Tuning
Snark S-5 Mini Guitar & Bass Tuner 2 Pack | Guitar Center
Mini-Stomp Chromatic Digital Tuner for for Guitar/Bass Bundle | AxcessAbles | LTUNER-1-BUNDLE-2