Speedo Air Seal XR Mirror Swim Goggle Functions: Steps, distance, calories counter, heart rate monitor, sleep monitor, blood pressure monitor, call\SMS\SNS alert, remote camera, weather forecast, music control, alarm clock, sedentary remind, etc. Compatibility: Compatible with android 4.3 and above, iOS 8.0 and above smartphones, please install the DaFit App in your phone and pair your phone with this fitness tracker from it. Design: Adopt high quality stainless steel shell, sensitive color touch screen, interchangeable rubber bands. Lightweight and compact, comfortable to wear, easy to see all kinds of information. Long Lasting Time: Built in 90mAh battery, energy-efficient chips, charging time about 1 hour, using time about 5 days, standby time about 10 days, dontworry about power shutdown anymore. Waterproof: The waterproof grade is IP67, whether take cold bath, wash hand or raining, there's no need to worry about damage. DONT CONTACT WITH HOT WATER OR WEAR IT GO SWIMMING!