This Ruxing Smart 1.91 ''screen smart watch meets functions such as Bluetooth call, photo taking, video recording, information notification, multiple exercise modes, voice assistant, smart reminder, heart rate and sleep monitoring, blood oxygen detection, listening to music, etc. Magnetic charging, 300 mA battery. IP67 waterproof, a variety of dial optional, smart watch compatible with Ios 12.0 or Android 8.0 above.