Huawei Watch 3 (Standard/Active Edition in Black), running HarmonyOS. Key Specifications Screen: 1.43-inch AMOLED display with high resolution and a 3D fluid glass touchscreen. System and Compatibility: Runs on HarmonyOS and is compatible with Android and iOS (iPhone) phones. Health and Sports Features: Continuous heart rate monitoring (24/7), blood oxygen level (SpO2) measurement, sleep tracking, skin temperature measurement, and over 100 sports modes. Battery: Lasts up to 3 days in smart mode, and up to 14 days in power-saving mode (Ultra-long battery life mode). Other Features: Supports phone calls with microphone/speaker, automatic app installation from Huawei AppGallery, and water resistance up to 50 meters (5ATM).