Amazfit Bip U Smart Watch comes with 1.43” Large Color Screen so that Enjoy a bigger and clearer view, 320×302 pixel resolution creates an exquisite visual display, making all incoming calls, messages, and reminders extremely clear. In this Smart Watch, 50 watch faces are available to suit your mood and outfit, or you can upload your own photos for a more personalized watch face. The Bip U also supports animated watch faces that make every glance at your watch a unique experience. It is also has Customizable Watch Face Modular. This Smart Watch featured with 31g Super-light Body and Designed for all-day comfort with An ultra-light design you can barely feel when striving for peak performance. Here 50m Water-resistance also available, Water-resistant up to 50 meters, you can wear the Bip U for swimming and it will record your achievements even under water. This new Smart Watch has 60+ Sports Modes with High-precision GPS3, The Bip U records your exercise data to help you work out at a higher level. You can check your walking distance, speed, heart rate changes, calories burned, and other key factors such as whether you are exercising in your fat burning zone or cardiopulmonary strengthening zone based on your heart rate, as well as providing instant alerts when your heart rate gets too high. Here, the Blood-oxygen Level MeasurementGrasp a new metric of health. This smart watch is equipped with a newly upgraded biological optical tracking sensor, the BioTrackerTM 2, that supports measurement of blood-oxygen saturation. When feeling unwell, under mental stress, engaged in intensive workouts such as marathons and gym sessions, or in high-altitude and hypoxic environments, you can immediately measure your blood-oxygen saturation and understand your physical state. The Sleep Quality Monitoring Improve sleep quality for optimal performance. The latest Bip U can maintain 24-hour heart rate monitoring. With its proprietary BioTrackerTM 2 PPG biological optical sensor, the Amazfit Bip U delivers accurate heart rate measurements. Here, PAI Health Assessment System9Compile vital health data into a simple score, Stress Monitoring Train your breathing to regulate stress levels, Menstrual Cycle Tracker Receive alerts and plan ahead. This latest Amazfit Bip U Smart Watch has no warranty.