IP68 waterproof and 40 days battery life : Advanced IP68 super waterproof function, can be worn while swimming (NOTICE: it can not track your swimming data). Activity tracker built with battery of 200mAh, only takes 2.5 hours to charge and can be used for up to 10 days with standby time up to 40 days. Exceed Your Expectations : Equipped with 1.3 inch color touch screen, Different display of stylish dials, set your different moods, also includes a bunch of handy tools including music control, breathing guides, stopwatch , countdown timer, making it more than just a health tracker. 1 year warranty and lifetime service : Buy risk free Guaranteed after-sales service to ensure your long-term pleasure. If you have any questions about the smartwatch, please contact us. Quick 24 hour response, only offered by Blackview support. Smart Watch for iPhone and Android Phones : Compatible with most smartphones iOS 9. 0 and Android 4.0 and above (not for PC, iPad or tablet). never let you miss important things. Support iPhone, Samsung, Huawei, Xiaomi, OnePlus, etc. Accurate Activity Tracking : The smartwatch supports exercise modes which can help you better record your different activity data. Real-time heart rate monitoring, automatic sleep tracking, can also track your steps all day, calories burned and distance traveled, help you develop a healthier lifestyle.