[All-day monitoring] The basic tracking indicators of this tracker include steps, mileage, calories and heart rate. It can track your exercise status all day, help you make a fitness plan, and measure blood oxygen saturation, stress, sleep and other data.[Connect APP to achieve more functions] After connecting to the phone via Bluetooth and APP, you can make more settings, such as viewing the history of various data on the phone, understanding your physical condition and exercise trends, and turning on the exercise mode. You can view your exercise trajectory on the phone (through the phone's GPS). In addition, there are many styles of watch faces on the APP for you to choose[Incoming call and message notifications] After connecting to the phone, you can receive incoming calls, text messages and SNS notifications (including Facebook, Twitter, WhatsApp and Instagram) directly on your wrist. When the phone's Bluetooth is turned on, if you receive a message, the watch will vibrate to remind you, and you can view the specific information[More functions waiting for you to explore] This watch has more functions waiting for you to explore. Including alarm clock, event reminder, water drinking reminder, music control, weather query, etc. Most functions need to be connected to the APP on the mobile phone to open[Note] When you install the strap for the first time after receiving the product, you need to squeeze the strap inward to ensure that the strap is fastened successfully, otherwise the strap will fall off.