Features: Sleep monitor, Notifications, Menstrual cycle tracking, Sedentary reminder, SpO2 (blood oxygen saturation) monitor Battery Capacity: 14 days Connectivity: Bluetooth Wireless Communication Standard: Bluetooth Battery Type: Lithium-ion Shape: Rectangular [Thin and Lightweight for Comfortable Wear] The body is 8.99mm thick and weighs 14g (excluding the strap). It's thinner and lighter than the previous model, further improving the wearing comfort. The 1.47-inch AMOLED high-definition full-view display enhances visibility and operability in sunlight. Typical use provides a 2-week battery life. [High-Precision Sleep Monitoring] Sleep monitoring accuracy is 10% better than the previous model. More detailed sleep mode settings are available. Sleep data is easily visible on the device's display. [24-Hour Health Management] Heart rate and blood oxygen levels are monitored 24 hours a day using an optical lens and AI-based data processing. The device vibrates and displays an alert when the heart rate exceeds a certain level or when the blood oxygen level falls below a set value. [Abundant Notification Functions] Displays notifications from apps like LINE, allows you to check incoming calls and reject calls, check messages, and offers various smartphone function replacements such as timer, alarm, and weather forecast. [Up to 100 Workout Modes] Supports HUAWEI True Sports, a Huawei-exclusive algorithm for scientifically measuring training. Thank you for viewing. I have been using it for a year after purchase.