1.1.43-inch HD touch AMOLED screen is committed to bringing better products to consumers. We conducted thousands of tests and studies on this self-developed S5 smartwatch and finally decided to use a 1.43-inch ultra-high-definition AMOLED screen. Compared with traditional LCD panels, AMOLED has low energy consumption, the panel emits light independently, is richer and brighter, and the screen can be clearly seen outdoors during the day. 2.[Make/Receive Calls and Read Messages] With the built-in microphone and speaker, you can easily answer and make calls via Bluetooth without taking out your phone. It also supports messages from Facebook, WhatsApp, Instagram, etc. Whether you are in a busy work environment or outdoors, you can always stay in touch with family and friends. 3.[Precise Health Monitoring-Your Health Assistant] The S5 smartwatch is equipped with a 24-hour heart rate sensor to help you detect real-time heart rate throughout the day ("non-medical use"). And it will automatically monitor your sleep status and provide a comprehensive sleep quality analysis (deep/light/awake sleep) in the "Wear" app. 4. [105 Sports Modes & IP68] The S5 fitness watch has 105 sports modes, including walking, running, cycling, skipping, basketball, etc., which can meet the needs of most sports enthusiasts. During your exercise, the fitness tracker will record your data in real time in the " app, such as heart rate ("non-medical use"), steps, calories burned, distance and activity time. With IP68 waterproof function, it will not be damaged even when exercising.