Description: 1. Designed for 3.5mm jack devices like headphones, headset or microphones that stop working or have iues with output cutting in and out. 2. It is also suitable for sound card in the computer/laptop/desktop that dying or losing connection with motherboard. 3. Microphone/Headphone mute design makes the headset and speaker mode switch freely without unplugging anything from the computer. Output audio sound can be adjusted by the volume adjustment wheel. 4. Mixer Function can adjust the output electronically level. Functional keys including microphone-mute, speaker-mute and volume-up/down roller.It easy to extends your stereo speaker or earphone to 7.1 channel environment, giving you high quality sound enjoyment. 5. Easy to use, Driver-free installation, plug and play, compatible with multiple systems: Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, Linux, and other systems; Specification: Type: Sound Card Model: GS3 Color: Black Size: 20*7*3cm Cable length: 7.5cm Sampling rate: 44.1K/48K/96K Features: virtual 7.1 surround sound Package Included: 1 x Sound Card Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3cm differences due to manual measurement.