Features: Mini analog rotary speaker effect pedal with true bypass. 4-stage phase change simulation. RATE knob adjusts sweep rate of VIBE effect. LEVEL knob adjusts the level of the signal. DEPTH knob adjusts the amount of sweep deviation. ON/OFF LED light for indicating effects or bypass status. Full metal shell, durable and exquisite. Specifications: Material: Metal Input: 1/4 34; Monaural Jack Output: 1/4 34; Monaural Jack Power Supply: DC 9V Working Current: 300mA Item Size: 9.5 * 4.2 * 3.3cm / 3.7 * 1.7 * 1.3in Item Weight: 175g / 6.2oz Package Size: 10 * 6 * 6cm / 3.9 * 2.4 * 2.4in Package Weight: 210g / 7.4oz Note: The guitar showed in the picture is not included. Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English Chinese)