Part of the MINI pedal family the Made in Japan TRMINI Tremolo features a three-knob configuration; Wave Speed and Depth. It also features a Level trim pot which enables boosting the overall affected sound. A true bypass switch provides the shortest most direct signal path as well as the cleanest tone. The 100% analog circuitry offers amazingly natural tremolo tones. The TRMINI is a classic warm and full-sounding tremolo pedal that�¢??s also economical on pedalboard space!�¢?�¢Wave Depth and Speed controls�¢?�¢True Bypass�¢?�¢Level trim pot�¢?�¢Required Current: 13mA@9V�¢?�¢Power Supply: External DC 9 volt AC adapter(Center-negative)