Operating system Wear OS Special features Custom Activity Tracking, ECG, GPS, Heart Rate Monitor, Oxymeter (SpO2) Battery capacity 530 Connectivity technology Bluetooth Wireless communication standard 2.4 GHz Radio Frequency, Bluetooth About this item 【Premium Materials, Superior Design】HUAWEI WATCH Ultimate's zirconium-based Liquid Metal case, first on smart watchs, is stronger and more wear and corrosion-resistant；The 1.5-inch LTPO AMOLED screen fits snugly under the sapphire watch dial； 360° compass-inspired bezels are sure to bring out your inner explorer! 【100 m Diving Technology 】HUAWEI Watch Ultimate gives you the freedom to take on more challenging dives, thanks to its 16-structure water-resistant design and micron-level water-proof filter；Diverse diving modes like recreational scuba diving, technical scuba diving3, gauge mode diving3 and free diving. 【All-new Expedition Mode】HUAWEI WATCH Ultimate's all-new Expedition Mode is backed by Dual-Band Five-System GNSS to ensure more accurate positioning. With 20+ professional and 100+ basic fitness modes, this watch covers the outdoor activities of your dreams, from hiking to cross-country running to mountain climbing. 【Robust Battery Life and Fast Charging】14-day battery life with typical use；8-day battery life with heavy use；Charges to capacity in 60 min, with wireless fast charge. 【Professional Health Management 】Beat-by-Beat ECG Analysis ；Arterial Stiffness Detection；All-Day Health Management.