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. Length: 30 cm. Headset adapter for headsets with separate headphone and microphone plugs / 3.5mm. Connect an external microphone and powered speakers to the audio port on your laptop. Compatible Device: Laptop, Mobile Phone, MP3 Player, Headphone ,PC. Note: Allows the use of older audio accessories with newer laptops, tablets and smartphones having one 3.5mm jack port. If you are using Microphone to record voice/Song with this product in Mobile/Laptop/PC then using Voice record application, otherwise voice not record.(External Mic is not supported) Turns a 3.5mm audio output port into two distinct ports:one headphone port and one microphone port, you can connect your headsets (audio & microphone) to laptops, PC with 3.5mm 3-pole plug.