The Microsoft Ethernet Adapter is a compact and portable device designed specifically for Microsoft Surface Pro 3, 4, and 3. It allows for a 1:1 connection split/duplication and features an Ethernet crossover (RJ-45) connector for easy and convenient use. The adapter comes in a sleek black colour and is ideal for those who need to connect their Surface device to an Ethernet network quickly and efficiently. With a cable length of 10cm, this unit is a reliable and practical accessory for Microsoft Surface users. Please note look at pictures box is damaged but the cable has never been used and is new