[Children's Sports Watches] Activity Tracker: No phone connection required, no need to download apps, just use the watch to track steps, calories, kilometers and record all daily exercise data. [Silent Vibration Alarm:] Vibration alarm reminds children to study and rest on time. Whether it's a classroom or a bedroom, the vibration design will not disturb others, which is perfect for students. [Convenient Charging:] There is a USB port on the dial, you can use any USB adapter (such as smartphone adapter, computer) to charge the watch, and the battery life is 15 days or more. [Excellent Quality] - Environmentally friendly ABS watch case + high-quality stainless steel metal parts make the watch durable. Soft food-grade silicone strap is more suitable for children and effectively protects your child's wrist. [Waterproof to 50 meters:] You can wash your face, wash your hands and walk in the rain while wearing it, but it is not recommended to use it while swimming.