When using it for the first time, you need to press and hold 4 buttons at the same time for 3 seconds to turn on this smart watch: This smart watch has a long life. The smart watch comes with a CR2032 battery, which can be on standby for up to 24 months. Say goodbye to unusable USB data cables and Charging port, it doesn't need to be charged every day, every day or every month, it's the battery - almost like a traditional watch. This smart watch has a built-in accelerometer, so you dont need to carry your phone when exercising. It can record steps, calories and exercise distance within 24 hours. Water resistant to 50 meters, suitable for swimming, showering and diving. There are two sports modes to choose from: running and cycling. To do this, open the application and there is a button in the lower right corner. After selecting the mode, click the upper right corner again to activate the GPS function to get the sports map. The smartwatch also has alarm clock, stopwatch, calendar and camera functions. It will beep to notify you when you receive text messages and phone calls. It adopts a military-style sports dial design with a diameter of 50 mm and a strap width of 26 mm.