Chromatic Pedal Tuner Plus | D'Addario Accessories - YouTube
D'Addario Chromatic Pedal Tuner Plus – Eastside Music Supply
Amazon.com: D'Addario Accessories Guitar Tuner Pedal Plus - Chromatic Tuner for Electric Guitars, Bass Guitars and More - Fast and Accurate with True Bypass - Full Color Display with Programmable Countdown Timer :
The Ultimate Guide to Guitar Tuners - Andertons Guide