USED Excellent 42mm size with a 1.2-inch 3D curved AMOLED touch screen. Extremely lightweight (29g) and elegant. Battery: Up to 7 days of battery life on a single charge. Fitness and Health: Built-in GPS, 5ATM water resistance (safe for swimming), 24/7 heart rate monitoring, TruSleep tracking, and multiple workout modes. Music Storage: 4GB internal memory (stores up to 500 songs directly on the watch for phone-free listening with Bluetooth headphones). Compatibility: Works with both Android and iPhone devices via the Huawei Health app (uses standard 20mm straps). Condition: Used