IP67 Waterproof Rating: You don't have to take off the watch while washing your hands, easily withstands light rains and water drop Durable Construction: The watch frame is made of zinc alloy, shockproof and anti-drop HD Large Screen: Equipped with a 2-inch high-definition square screen, it brings a comfortable touch feeling and excellent visual experience 100 Sports Modes: Supports numerous sports modes and can connect to your phone to record daily activity data, such as steps, calories, distance and activity time Health Monitoring: It can help monitor heart rate, blood oxygen and more. You can see its comprehensive analysis on the App as a reference to adjust your lifestyle and form a healthier one Bluetooth Call: After connecting the watch to your smartphone via Bluetooth, you can make phone calls or reject the calls on this watch NFC Function: As long as you write the access control information into the watch, as long as the watch is close to the recognition area, you can unlock the door. Also allows you to make the payment easily Specification: App: Da Fit Screen size: 2.0 inch, resolution: 240x296 Main control chip: RTL8763EWE PPG chip: HX3600 Battery capacity: 230mAh Memory: 128MB Waterproof level: IP67 Material: zinc alloy and silicone Charging time: 2-3 hours Working time: 5-7 days Charging method: magnetic charging Heart rate, blood oxygen, female physiological cycle, sedentary reminder, dial customization, wrist flip screen, time display, remote photo taking, music control, alarm clock, multiple sports modes (not supported swimming), etc