Multifunctional, 2-in-1, work as tuner as well as power supply. Scientific and rigorous tuning program to make tuning more accurate and stable. With eight isolated outputs, can power eight 9V pedals simultaneously - 6 for 100mA, and 2 for 500mA. Compact and portable design, easy to carry along. True bypass design, minimizes tone loss and get more control of your pedal.