[Wide application] Designed for 3.5mm jack devices such as earphones, headsets, microphones to stop working or output cut-in and disconnection problems. It is also suitable for computer/notebook/desktop sound card crashes or loss of connection with the motherboard. You can still Use our products to use microphones and headphones on iMac / Mac Mini devices at the same time. $[LOUDER PREVIOUS-SOUND] Makes the sound that the computer can’t produce louder, creating a surround sound effect and giving you a dreamlike feeling. Support ordinary stereo, earphone, earphone, headset or microphone with 3.5mm jack, Raspberry Pi 2/3 Xbox PS4 Surface Tablet Laptop, especially suitable for gaming headsets. $[No driver] Easy to use, no additional driver, plug and play, plug and play, plug and play. The microphone/headphone mute design allows the headphone and speaker modes to be switched freely without unplugging anything from the computer. The output audio sound can be adjusted through the volume adjustment wheel. $[Mixer FUNCTION] Mixer Function can electronically adjust the output level. The function keys include microphone mute, speaker mute and volume increase/decrease. Mini LED indicator and surround sound can increase the level of game audio. Two headphone jacks and one microphone jack. It can meet all your needs for external sound card adapters. $[OPERA TIING SYSTEM] The external USB 2.0 sound card adapter is compatible with all mainstream operating systems, such as Windows 98SE / ME / 2000 / XP / Server 2003 / Vista / Windows 7, Linux, Mac OS, etc. The lightweight and portable size makes it easy to carry around.