A. F57L Blood Glucose Watch is a waterproof smart watch for health and sports. It has functions of heart rate, blood pressure, blood oxygen, and body temperature detection. B. Product Model: F57L C. Screen Size: 1.91 inches, 280 * 320 pixels D. Battery Capacity: 260 mAh E. Operating System: iOS 9.0 and above, Android 4.4 and above F. Charging Method: Magnetic charging cable G. Strap Colors: Metallic black, champagne gold H. Specifications: - [1.91-inch high-definition large screen] It has a high color gamut, ultra-narrow bezel, and a large screen. The colors are rich and delicate, and the visual effects are realistic and vivid. - [50 sports modes] It supports up to 50 professional sports modes, based on accurate real-time heart rate monitoring and artificial intelligence algorithms. The watch will record various data during the exercise in real time to help ensure more efficient and safer exercise. - [Heart rate monitoring] The watch is equipped with an optical heart rate sensor, which can perform relatively high-precision heart rate monitoring throughout the day. The LED lights on the back shine onto the wrist to monitor the different flow rates of blood. - [Blood oxygen detection] The smart watch is equipped with an advanced PPG biological tracking optical sensor. It can measure and potentially adjust in time after fatigue or exercise. - [Wrist thermometer, 24-hour body temperature measurement] When testing body temperature, the bottom temperature sensor must be in full contact with the skin (test after wearing for 10 minutes). The body temperature test may be affected by the environmental temperature difference and is mainly for early warning and reminder. I. Package Contents: - 1 bracelet - 1 charging cable - 1 instruction manual