Amazon.com: Guitar Tuner - Chromatic Clip-on Tuner for Guitar, Bass, Violin, Ukulele, Banjo, Brass and Woodwind Instruments - Bright Full Color Display - Extra Mic Function - A4 Pitch Calibration - White : Musical Instruments
Amazon.com: eno ET-33 Clip on Digital Guitar Tuner (ET3000-Black) : Musical Instruments
Korg TM-60C Combo Tuner Metronome + Contact Microphone at No Limit Guitar Co