Features 1、3 functional knobs(rate/depth/ramp) for adjusting the performance of the vibrato effect. 2、Traditional vibrato effect makes the guitar sound more excellent. 3、Ramp knob controls the switching time of different speed. Specification Features: 3 functional knobs(rate/depth/ramp) for adjusting the performance of the vibrato effect. Traditional vibrato effect makes the guitar sound more excellent. Ramp knob controls the switching time of different speed. A single footswitch is smartly designed to switch effects and speed. Full metal shell, durable and sturdy, lightweight and compact. Mini palm size, compact, portable and easy to operate. With true bypass switch and LED working status indicator light, powered by AC adapter. No slip silicone pads on the bottom, which making the effect pedal non shifting and anti slip during performance. Specifications: Material: Metal Input Impedance: 1M ohms Output Impedance: 10K ohms Power: External AC adaptor delivering 9V DC regulated minimum 300mA Item Size: 94 * 54 * 51mm / 3.70 * 2.13 * 2.01in Item Weight: 167g / 5.89oz Package Weight: 202g / 7.15oz Package Size: 10.3 * 6.5 * 6cm / 4.06 * 2.56 * 2.36in Package List: 1 * Effect Pedal 1 * Manual (English) Package List 1 * Effect Pedal 1 * Manual (English)