" 1.39 inch AMOLED Display with high 326PPI resolution (retina level). Corning Gorilla glass & anti-fingerprint coating. 5ATM water-resistance to ensure a normal use up to 50 meters water pressure.c. 24 days battery life to avoid frequent charging and focus on your daily activities mind free. 28nm ultra low power consumption Sony GPS chip, consuming only 1/3 power compared to similar GPS chips. Self-developed DualHeaTeck technology to achieve 24/7 uninterrupted heart rate measurement more efficiently and with lower power consumption."