1. This product adopts aluminum alloy shell and anti-oxidation gold-plated plug to reduce the transmission loss of sound quality. 2. At the same time, prevent the plug from rust and oxidation. Enameled copper wire conductors made of selected paint and baking, the output is no noise, no current sound, 3. Used to connect audio equipment with 3.5mm interface, 4. Suitable for computers, all-in-one computers, notebooks, tablets, mobile phones, sound cards, car AUX interface TVs, DVDs, etc., 5. This model can support mobile phone headset microphone function specification: Product name: 3.5mm stereo male-to-female headset extension cord 3696 that supports microphone function Interface type: four-level 3.5mm male *1 colour: black Material: tensile fiber woven mesh size: 3m Package Contents: 1*Audio extension cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.