This Ruxing Smart 1.75 ''Hd Smart watch supports Bluetooth calls, Sos, information notifications, multiple exercise modes, Smart reminders, heart rate and sleep monitoring, blood oxygen detection, listening to music and other functions. Multi-style dial optional, magnetic charging, 300 mA battery. IP68 waterproof, smart watch compatible with Ios 10.0 and Android 5.0 above. Strap offers comfortable soft silicone, stylish steel strap and mesh strap styles for your choice.