Operating system Android Memory storage capacity 2300 MB Special features Built-in Alexa Assistant Connectivity technology Bluetooth, GPS, GLONASS Wireless communication standard Bluetooth, 2.4 GHz Radio Frequency About this item Premium and stylish design with a round-shaped 3D curved bezel-less display Features 1.39-inch high-resolution amoled display for clear and vibrant visuals Built-in GPS and glonass for accurate tracking of outdoor activities BioTracker 2 PPG optical sensor for 24/7 heart rate monitoring Features SpO2 measurement to monitor blood oxygen saturation levels