The Xiaomi Watch S4 features a sleek aluminum design with a 1.43" AMOLED display, 1500 nits brightness, and multi-system GPS. It includes heart rate and SpO₂ sensors, 15-day battery life, 5ATM water resistance, built-in speaker and dual mics for Bluetooth calls, NFC support, and Bluetooth 5.3 — a perfect smartwatch for fitness and everyday smart living.
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