Features: brand new and high quality Headphone Audio Adapter: 3.5mm for M to 2.5mm F audio adapter or 2.5mm for M to 3.5mm F audio adapter convert your electronic devices, help you easily conver the audio. 4-pole 3 Ring Plug Adapter: 3.5mm male to 2.5mm female/2.5mm male to 3.5mm female audio adapter converter adopts electroplating process, metal for case, anti- scratching more durable, anti-oxidant corrosion resistance. Gold-plated interface make sure effectively reduce the loss of signal. Plug and Play: Sound quality fidelity transmission, plug and for play, easy to use, The slim design makes this the best style to use, there are no for extra cable cords or odd angles, help easy plugging and unplugging, mini size and portable. Application: Connect your notebook, MP3 player, smartphone or most audio device with a 3.5mm/2.5mm headphone jack to your headset with microphone. Widely work with headphone, home audio equipment, amplifiers, mixing console, home theater devices. Package Contents: 1pc 3.5mm male to 2.5mm female headphone audio adapter or 1pcs 2.5mm male to 3.5mm female headphone audio adapter. Specifications: Material: Metal Type:3.5mm Male to 2.5mm Female/2.5mm Male to 3.5mm Female Size: Approx. 4cm /1.57 inches Package Includes: 1x Audio Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.