Operating system ios Memory storage capacity 16 GB Special features smart watch for men android, gps smart watch, Connectivity technology Bluetooth Wireless communication standard Bluetooth Smart watch, smartwatch, smart watch for men, smart watch for women, android smart watch, smart watch for android, About this item • [Continuous Health Monitoring) HUAWEI Watch 3 allows continuous blood oxygen, heart rate and skin temperature monitoring • [3-Days Battery Life**] Enjoy 3 Days Battery Life in smart mode, and an incredible 14 days' use in ultra-long battery life mode