It sounds like you're referring to a standard audio extension cable with a length of 1.5 meters and a 3.5 mm jack connector. These cables are commonly used to extend the reach of headphones, earphones, or audio devices with a 3.5 mm audio jack. They allow you to connect devices like headphones or speakers to audio sources such as smartphones, tablets, laptops, or stereos while providing more flexibility and freedom of movement. They're handy for situations where the existing cable is too short to reach comfortably. You can find these cables in various lengths and qualities from electronics stores or online retailers.