Please note: This splitter can not support external mic,Please email us before you make purchase if you are not sure about compatibility of your device with this 3.5mm splitter so we can help you to choose right model for your device. Note: While using this headphone splitter with PC applications; make sure that you have selected Microphone and Headphones options in Audio settings of the application. Cable Legth: 30cm. Turning a single 4-Pole 3.5mm audio headset port into two female port with mic function. MORE VALUE - Allows the use of older audio accessories with newer computers (One 3.5mm jack port computer), enjoy Great Sound Quality-Allows you to use a higher quality headset with your smart phone. 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. If you are using Microphone to record voice/Song with this product in Mobile/Laptop/PC then using Voice record application, othervise voice not record. 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. BROAD COMPATIBILITY - Allowing you to connect an external speaker headphone and microphone to your Xbox one controller, PS4 controller, laptop, tablet, PC computer or smartphones with a single 3.5mm 4pin combo port.Note: This Splitter cannot be used for any kind of recording purpose