1Aluminum alloy material, oxidative cutting edge technology, rugged, long service life. No driver, plug and play 2The appearance is fashionable, convenient, comfortable, easy to carry. Built in microphone head, no external microphone only when voice input 3A variety of language automatic translation functions, supporting up to 24 languages. Voice to text converter USB 4Adapters are ideal for travel, shopping, business meetings, entertainment, dating, learning foreign languages, etc 5Solve typing, high sentence translation accuracy, easy voice translation, wide compatibility Item Type: USB Audio Adapter Model: For S518 Material: Aluminum Alloy Colour: Black Function: USB External Sound Card , Voice Translation Interface: USB Interface Audio Interface: Approx. 3.5mm / 0.14in Compatibility: Compatible with for Windows for Linux for OS X 1 x USB Audio Adapter1.Please allow 0 to 2 cm error due to manual measurement. Thanks for your understanding