The D'Addario Pedal Tuner Plus boasts the speed and accuracy of the original Pedal Tuner, with two new features. First, it has a high-quality signal buffer that keeps your sound from long cables and prevents signal loss through the effects chain. Second, it includes a programmable countdown timer to keep track of the set time or session time. It all comes together to create an exceptional multi-purpose pedal tool that keeps you in tune.