Dear friends, Thank you very much for your support, this is a multi-functional sports smartwatch! This product has a lot of very practical functions! For example, NFC function, you can open the door through the watch! Bluetooth call function, after connecting the Bluetooth of mobile phone, you can make a call directly.AI voice assistant function, open the watch function by voice! There are also some medical functions, you can monitor the heart rate, blood pressure, pay attention to your health! All are very practical functions! Product Parameters Screen size: 1.3-inch HD colour screen Waterproof rating: IP68 Service life: use about 5-7 days, standby about 30 days Resolution :360*360 Battery capacity :200 mah Application :FitCloudPro Charging method: Wireless charging Compatible system: Android 5.0 and above; iOS 10.0 and above Bluetooth :BLE5.3 Function: Health: blood pressure, heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc. Smart reminders: incoming calls, SMS, emails, WeChat, QQ, Facebook, Twitter,