Hama Alu Line 3.5mm Jack Plug Adapter for connecting two pairs of headphones simultaneously to an MP3 player/a mobile phone, etc. 

This 3.5mm headphone splitter supports the microphone function. You can connect the two 3.5mm male connectors to the two 3.5mm audio ports on your computer, (one for the headphone, and one for the microphone), and then you can connect your 3.5mm headphone with mic function to the 3.5mm female port of the mic splitter cable.

The wire core of this microphone and headphone splitter is made of oxygen-free copper material, which can maximize the conductivity and durability, maintain the quality of the sound, and minimize the loss of sound quality during the conduction process, giving you the best sound experience.

This headphone jack splitter cable has a wide range of compatibility, the 3.5mm female port is compatible with 3.5mm wired headphones, headphones, and speakers; 3.5mm male headphone and microphone port, compatible with all tablets, laptops, and desktops with separate 3.5mm headphone and microphone ports.