30 days warranty on the product. The 2.5D curved surface display every detail, the rounded corner window is more harmonious in the whole, which perfectly creates a unique visual beauty. Slide more freely. Realtime tracking of activities such as steps, calories, active hours distance, exercise are measured around the clock. The precise sensor helps you to keep a track of your blood flow, Heart rate displayed in real time to avoid excessive heart rate caused by unreasonable exercise.