[Bezel-less Design&AMOLED Display] The Amazfit GTR 2 new version is equipped with a curved bezel-less design and 1.39”HD color AMOLED Always-on display, resulting in a better visual aesthetic and a wider field of vision. [All-round Health&Fitness Tracking] With one Amazfit GTR 2 new version smart watch, you can have your heart rate, blood-oxygen saturation level, sleep quality and stress level all taken care of, PAI health system will convert all these data into a single, intuitive score, for users to easily understand their physical state. [90+ Bulit-in Sports Modes] Activate one of the sports modes that you need and, after the exercise is over, the sports watch will produce a corresponding ytical report which is also viewable in the mobile app, to help you continuously improve your exercise plan. [Bluetooth Calls&Alexa Built-in] The smart watch includes a microphone and speaker to let you answer calls on your watch when it's inconvenient to pick up your mobile phone and to set alarms and timers, check the weather, control your smart home devices, create shopping lists, ask questions, get translations and more, just raise your wrist and ask Alexa. [3GB Music Storage&Playback] With GTR 2 new version smarch, you can control the music on your smartphone through the watch via Bluetooth connection. Also provided is a massive 3GB of local music storage space, enough to transfer 300-600 of your favorite songs to the watch through your mobile phone..band.color : Grey