This cable is 8" long.
This cable is brand new (no packaging). I don't know what it was originally intended for. I got them from a company called OnBoard Research.
One side is a 3.5mm (1/8") Male TRSS plug and the other side has 2 Female 3.5mm (1/8") ends. These 2 Female ends show that one is for Headphones and one is for a Microphone.
That's all I know!
Please message me with any question or concerns.