Color:Silver Knob MLEEDA makes every effort to improve customer experience because your satisfaction is with us very important. If you need help or a suggestion for our products, please feel free to contact us. ?Very convenient connection: This USB Volume Controller?Plug and play, no driver required, you can directly connect to the computer operating system through the cable to adjust the volume. ?Wide range of applications: It can also adjust the volume via OTG, connect phones, car navigation, set-top boxes and other Android devices. Support operation systems: Windows (XP/Win7/Win8/Win10, etc); Mac; Linux; Vista; Android. ?Highlight: 1.Big chassis, metal body, HIFI appearance, stable using, without movement, one finger operation, quick reaction and multifunction. 2.The little sticky pads on the base make sure it won't rattle or move around when you operate the knob. Very nice touch. 3.The light only turns on when you change the volume, with a nice smooth fade out too. You can feel the notches in the knob as you change the volume. Not an audible click. Instead just something you can feel through your fingers. 4.The USB cable is replaceable(1.5m) 5.The knob base is solid metal, not plastic. Feels very good in the hands and its matte black. 6.Current protection function, supporting overload voltage and instantaneous current protection function, safe and convenient to use ?Package Includ: USB volume control *1 USB cable *1 (The USB cable with nylon outer layer or rubber outer layer is equipped with random)instruction manual *1