Features:USB computer volume controller multimedia computer speaker external audio volume control adjustment knob blackAluminum metal shell, aluminum alloy matte anti fingerprint, one click anti slip rotating button, more comfortable touch and scratch resistance than plastic coverUSB plug and play. 360 degree rotatable curved button for easy use (volume adjustment, mute, up and down, pause), avoiding discomfort caused by sharp edgesLossless sound quality. Directly adjust the audio source without affecting audio qualityspecificationsAnti slip pad. There is a soft pad at the bottom, which is stable and non slip during useName: USB faderColor: BlackMaterial: Aluminum alloyInstallation method: USB driver freeSize: 61x61x28mm/2.4x2.4x1.1 inchesLine length: 1.87m/7.2ftPackaging size: 128x100x35mm/5.04x3.94x1.38inMode: button for switching between dual modesApplicable to: for Windows, for Mac OSPackaging includes1 * USB volume controller