2.5mm male to 3.5mm female audio headset adapter provides stereo/mono capabilities to convert your 3.5mm headset. The converter allows you to seamlessly use 3.5mm headphones with phones that have a 2.5mm jack. Features - Material: Zinc Alloy. - Dimension: 4 * 0.5 * 0.3cm. - Temperature range 0-60 (). - Rated load 5 (VA). - Insulation resistance 10 (M Omega;). - 2.5mm male to 3.5mm female headphone adapter phone conversion head. - Uses: This adapter allows the 3.5mm headset interface to use the 2.5mm on the headset phone. - Advantages: audio fidelity transmission, plug and play, easy to use. - Product Plug: 2.5mm male audio connector, 3.5mm male female connector. - The connector plug provides excellent clear audio quality. - The adapter provides stereo/mono capabilities to convert your headphones 3, 5mm. - Use the 3.5mm headphones with phones that have a 2.5mm jack.