Wear OS by Google. Powered by the Snapdragon® W5 + Gen 1 wearable platform. Up to 65-hour long battery life, 32GB large storage. 12-channel advanced health monitoring technology. Support 160+ sports modes including professional ski mode. 5-system L1+L5 GNSS. 2.4GHz/5GHz Wi-F. Brightness up to 600 nits. 4nm Processor. 5ATM waterproof. App: Mi Fitnes. Note: IOS not support.