Shape square dimension 45*38*13mm weight 50g display ips screen size 2.0 inch screen resolution 435*485 pixels compatible os android & ios sensors heart rate sensor g sensor bluetooth v5.0 & v3.0 gps no speaker yes microphone yes multi-sports mode yes heart rate monitor yes blood oxygen monitor yes blood pressure monitor yes waterproof ip67 waterproof additional features bluetooth calling thermometer sedentary reminder sleep monitor alarm barometer brightness adjusting ... etc battery capacity 200 mah normal usage 2-5 days app name rdfit