Features 1.Multi-port sound card: The external sound card has its own audio chip, which can transfer one USB port to multiple 3.5mm ports, so it can connect 3.5mm audio devices such as headphones, headphones, speakers, microphones, etc. Supports single plug and dual plug headphones at the same time, no adapter is required.2.Stereo Sound Adapter: It prevents electromagnetic interference and enjoys stable and optimal sound quality. perfect for Skype / ICQ / Google Hangouts / TeamSpeak, it is also suitable as a second source for simultaneous operation of speakers and headphones.3.Wide compatibility: Compatible with all common systems, including Windows XP, 7, 8, 8.1, 10 and Vista, Mac IOS systems. Plug and play, no drivers required.4.Simple and convenient: easy to use, no additional drivers required. Plug and play instant audio playback.5.Mixing function: The mixer function can adjust the output electronically. The function keys include microphone mute, speaker mute and volume up/down wheel. Mini LEDs and surround sounds increase the level of game audio. Two headphone jacks with one microphone jack for all your external sound card adapters. Input interface: USB/ Mic/ Line/ SPDIFHeadphone jack: 3.5mm*1Microphone interface: 3.5mm*1Four pole single plug interface: 3.5mm*4PIN American standard *1USB interface: 2.0 extension *3Frequency response range: 20Hz - 20KHzTotal length of the headphone cable: 1.20.1M Package included: 1 x sound cardOnly the above package content, other products are not included.