Cpolebev USB Volume Control Lossless PC Computer Speaker Volume Controller Knob Adjuster Digital Control with One Key Mute,

Non-slip mat. There is a soft pad at the bottom, which is stable and non-slip during use Lossless sound quality. Adjust the audio source directly without affecting the audio quality.suitable for use with desktop or laptop Feature: High-quality materialsl housing. matte anti-fingerprint, one-button non-slip rotary button, more comfortable touch and scratch resistance than plastic cover USB plug and play. 360-degree rotatable arc button, easy to use (volume adjustment, mute, up and down, pause), and avoid discomfort caused by edges Broad compatibility. Support for WIN 7/8/10/XP, for , for VISTA, for Android, for iOS (mobile phone needs a suitable universal serial bus adapter cable)