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Key Features 1.43-inch AMOLED display with 466 × 466 resolution for sharp and vibrant visuals Up to 1000 nits brightness for clear visibility even under direct sunlight Durable 2.5D curved scratch-resistant glass for enhanced protection Premium aluminum alloy body with rotating crown for smooth navigation Built-in 5-system GPS support including GPS, BeiDou, GLONASS, Galileo, and QZSS Bluetooth 5.3 connectivity with support for Bluetooth calling 400mAh battery offering up to 18 days in basic mode and 10 days with regular use Up to 26 hours battery life in GPS mode for extended outdoor activities 24/7 health monitoring including heart rate, SpO2, sleep, and stress tracking Supports 120+ sports modes for comprehensive fitness tracking 1ATM water resistance suitable for rain, sweat, and hand washing AI voice assistant and smart notifications for calls, SMS, and apps 200+ customizable watch faces with multiple personalization options Remote camera control, music control, and find my phone/watch features Additional tools including weather forecast, stopwatch, timer, alarm, and flashlight Product Description The Haylou Watch 4S is a stylish and feature-rich smartwatch designed for modern users who want performance, durability, and smart functionality in one device It features a stunning 1.43-inch AMOLED display with 466 × 466 resolution and up to 1000 nits brightness, ensuring crystal-clear visuals in both indoor and outdoor environments Built with a premium aluminum alloy frame and rotating crown, the smartwatch offers a sleek design with easy navigation and long-lasting durability Equipped with 5-system GPS, it provides accurate and reliable location tracking for outdoor activities such as running, cycling, and hiking The smartwatch supports Bluetooth calling, allowing users to answer and manage calls directly from their wrist Advanced health tracking features include 24/7 heart rate monitoring, blood oxygen (SpO2) tracking, sleep analysis, stress monitoring, and menstrual cycle tracking With over 120 sports modes, it caters to a wide range of fitness activities and integrates seamlessly with the Haylou Fun app The powerful 400mAh battery delivers long-lasting performance with up to 18 days of standby time and efficient daily usage With 1ATM water resistance, it is suitable for everyday activities like hand washing, sweat, and light rain exposure Additional smart features such as voice assistant, notifications, customizable watch faces, and practical tools make it a perfect companion for daily life and fitness tracking..