Glonass+ GPS / waterproof : IP68 / Battery life for 45 days Exercise heart rate monitoring / The total weight is 32 g For one full charge can make battery last 45 days ， if set watch only monitor the steps and sleep， it can last 4 months long This watch has built-in Sony 28 nm low power consumption GPS chip， Using GPS + GLONASS dual-mode positioning search satellite signal， fast and accurate. Setting speed reminder and heart rate reminder， you can efficiently exercise. Whether you are running outside， running in the treadmill， riding or walking， you can check all data such as exercising time， speed movement distance， heart rate and so on. Display of the watch screen， raising his hand can see the content; reflective display， the stronger the outdoor light screen clearer; Full open GPS， battery life up to 22 hours 3， do not have to carry the charging treasure running race. Waterproof and dustproof IP684， basically go everywhere.