D'Addario PW-CT-23 Chromatic Pedal Tuner Plus

From the listing

Seller's description

The D’Addario Pedal Tuner Plus boasts the speed and accuracy of our original Pedal Tuner, plus two new features. First, it has a high-quality signal buffer, to maintain your sound across long cable runs and prevent signal loss through your effects chain. Second, it includes a programmable countdown timer to keep track of your set or session time. All of that combines to make a standout multipurpose pedalboard tool — keeping you in tune and on time. Features: Ideal for: Electric Guitar, Bass Guitar, Acoustic/Electric Guitar