1.3.5mm male to female can extend your 3.5mm cables and devices (earphones, smartphones and many more).

2.The extension cable can make your short headphone cable longer to use in anywhere.It's costy to buy a new longer 3.5mm cable, while it's so easy to get a 3.5mm male to 3.5mm female cable.

3.The 3.5mm cable provides added length, making it easier than ever to connect iPods, iPhones, media players, and other devices to a car stereo, portable speaker, or other compatible 3.5mm audio-output device.But it does not support microphone function or video function.

4.Spring Spiral design reduces cable clutter, Easily fits in purse or briefcase. Very small and light,thin, easy to carry.

5.Cable OD: 1.5mm.Extremely Straight Length(original length 17cm): 50cm.