Feature: 1. 360 Degree Rotatable: This USB volume control knob for PC features a 360 degree rotatable knob for accurate volume adjustment, along with a 1 key mute function, allowing you to easily control your computer's sound output. Equipped with a blue LED indicator light. 2. 1 Touch Mute, 1 Touch Pause: Press the key to mute or pause. (Press and hold the key for 8s to switch the key function). Press and hold the knob while rotating to skip to the previous or next track. 3. Sturdy Anti Slip Base: The USB volume control knob is made from aluminum alloy, sturdy and anti scratch. Additionally, the bottom of the multimedia volume control knob is covered with a wide non slip silicone base to ensure it does not slide on the desk while in use, providing excellent stability. 4. Plug and Play: This USB volume controller supports for Win 7 8 10 11 Vista, for OS X, for Android. Once connected to the computer, it works immediately with no need for drivers, just rotate the knob to adjust the volume directly. (Some devices like smartphones and tablets may require an adapter.) 5. Multi Occasion Use: USB plug and play. Suitable for listening music, watching videos, playing games, meeting, major supermarkets, computer training, wedding, celebration, party, activities and so on, easy to operate and convenient. Specification: Item Type: USB Volume Control Knob Material: Aluminum Alloy Color: Black Cable Length: Approx. 183cm / 72in Interface: USB Compatibility: for Win 7 8 10 11 Vista, for OS X, for Android Application: for PC, Laptop, Speaker, Sound System, Mobile Phone, Tablet . Package List: 1 x USB Volume Control Knob 1 x Storage Bag