This mouse shaker has on/off/mode button. "Long " turns on, the indicator light is on, the default mode is light dithering mode 1, "short " switches the mouse movement mode 1/2/3, and "long " turns off the indicator light, indicating that the mouse dithering is off. This mouse mover does not need to install any software/programs. The mini mouse mover has three modes: slight dithering mode; Random cell jitter mode; Random large range dithering mode. This mini mouse shaker is very light and portable. This product has memory function. boot continue the track of the last boot. Colour:black Material:aluminum alloy Size:21 x 15 x 6.5mm Package Contents: 1 x Mouse Jiggler 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.