Extra warranty, invoice available, used only two days. Color: Green Stainless Steel Size: 46 The watch is known as the latest version of Huawei's GT series watches. This version comes with a screen brightness of up to 3000 nits, double the previous versions, and a battery life of up to 21 days. The watch supports more than 100 sports training modes and more than seven medical measurements, and supports sleep tracking, sleep apnea detection, blood oxygen level measurement, and skin temperature. It also includes an accurate global GPS system. The watch comes with its box, invoice, and its charger is unused. It has nano-ceramic protection. The watch supports both iOS and Android systems.