Operating system HarmonyOS Special features Activity Tracker, Multisport Tracker, Touchscreen, Water Resistance, Wireless Charging Battery capacity 524 Connectivity technology Bluetooth Wireless communication standard Bluetooth About this item 【Wrist-based Ambulatory Blood Pressure Monitoring】Start a 24-hour auto-monitoring plan anytime, even while you're asleep, to see high-level BP data like average SBP and DBP readings during the day, at night, and over the past 24 hours, as well as accurate pulse rates 【Light and Slim Design】You can turn your watch into a timeless timepiece, with style watch faces and an Always-on Display (AOD) at your beck and call. You can even personalise the watch face to keep your most-used features literally close at hand 【Innovative Strap-Airbag Unibody】2-in-1 design packs a 26.5 mm ultra-narrow mechanical airbag that fits snugly and inflates with ease. It's also sweat-wicking and skin-soothing, and can be removed and replaced with just a press of the Quick Release button 【All-Round Health Management】Get a handy Health Glance report in just a few moments, and browse 9 key indicators, with dynamic trends laid out in intuitive graphs and charts, to see what your body is telling you right away 【Smart Lifestyle Features】Press the Up and Down buttons, you can take a watch screenshot; This smartwatch makes it easier than ever to immerse yourself in your favourite workouts, with 80+ exercise modes, automatic detection of six common activities, and pinpoint GNSS positioning; Connect the watch to your phone over Bluetooth to answer or reject calls and view call logs from the convenience of your wrist