Ultra large and clear 1.75" display Easy to view even in strong sunlight; More space to arrange your APPs as you like. Design with the innovative position memory loop design; 200+ stylish watch faces. Different appearances every day; 12-day extra-long battery life; Bluetooth voice calls. Light weighted all around Comfortable for all-day wearing. Independent satellite positioning chip Accurate tracking of every step; Scientific sleep monitoring - Helping you to sleep more deeply.