No need to install drivers and software, USB plug and play, Compatible with multiple systems Full metal case, non-slip rotary button, comfortable feel, comparable to non-plastic case. Replaceable USB cable design, will not cause the controller to be scrapped due to cable dae, more flexible and common with common mobile phone charging cables. Blue interactive breathing light, interacting with the operation, the visual feedback is more stylish, it is always on or off, it can be set freely. The volume controller with technical content is the third type of peripherals that a computer has in addition to the keyboard and mouse. Colour:black Material:Metal Package Contents: 2 x Volume Controller 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.