Precautions1.Bathing and swimming should not be worn.2.Please Connect the bracelet when synchronizing data.3.Use the included charging cable to charge.4.Do not expose the bracelet to high moisture, high temperature, or very low temperatures for long periods of time5.The bracelet appears to crash and restart. Please Check the phone memory information clear and try again, or exit the APP and reopen it.Component introduction*Host *Wrist strap *Charging cable *Packing box and instructions