Operating system Harmony OS Memory storage capacity 4 GB Special features Activity Tracker, Always On Display, Email, GPS Battery capacity 400 Connectivity technology Bluetooth About this item Tougher then Ever: Super-strong 550 MPa aluminium body—robust, lightweight, and wear-resistant. So Light，So Fit: Get a grip on a streamlined 9.3 mm body that weighs just 30.4 g, and marvel at its mesmerising 3D wing-like design that really moves the needle. Pro-level Outdoor Sports: Immerse yourself in your favourite activities, whether its basketball or padel, and benefit from data-driven workout evaluations and suggestions, with 100+ workout modes at your fingertips. Beat-by-Beat ECG App: New and improved electrode technology has made ECG signal collection more accurate and responsive. Run Wild, Not Out:Get a full day of power after 10 minutes of charging, thanks to the 2nd-gen HUAWEI WATCH Wireless SuperCharger.