Vibrato effect: classic photoelectric vibrato sound, wide adjustable range, very and well-proportioned pulsation. Bring in trills of different colors. 3 function knobs Speed, Bias and Depth. Working status: provide transparent sound. The LED indicator light shows the working status. The movement is without affecting the sound. Good Quality: Made of high-quality zinc alloy, sturdy and durable. Small size, space-saving, easy for guitarists to carry. Colour:silver Material:alloy Size:9.2x5.2x4.2cm Package Contents: 1 x effector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.