Cable Length: 30cm, 3.5mm stereo splitter cable allows you to easily connect your stereo headset Mic to a PC audio port and mic port at the same time. MORE VALUE : - Allows the use of older audio accessories with newer laptops, tablets and smartphones (One 3.5mm jack port computer), enjoy Great Sound Quality-Allows you to use a higher quality headset with your smart phone. mic port is not for record voice,it just for voice outgoing. EASY TO TAKE: - Featuring a compact, yet sturdy design, the headset splitter delivers the perfect solution for applications that require portability, and takes up very little space in your laptop bag. COMPACT DESIGN FOR MAXIMUM PORTABILITY :- A great solution to have on hand in your laptop bag. Plug and play, no matter single or dual plug your headphone is, this will make it work on your device. While using this headphone splitter with PC applications; make sure that you have selected Microphone and Headphones options in Audio settings of the application.