Anti-slip design The bottom is made of non-slip silicone, makes the product firmly hold the desktop and ino easy to slide. Neon Gradient Indicator Multi-color gradient light effects, keep you aware of your work status at all times. Specification: C / D / A / B Material: plastic colour: black Package Contents: 1 x Computer Desktop Switch(Out USB with audio) (Due to different product batches, the appearance may be different, which does not affect use.) 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.