DIZO Smart Watch 2, 1.69” (43mm) Fitness Tracker, Blood Oxygen, Heart Rate and Sleep Monitor, 5ATM Swimming Waterproof…

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Blood Oxygen Monitor(SpO2) : SpO2 is a major indicator of human health.That’s why our fully-upgraded watch includes an SpO2 measurement function.The DIZO Watch sensor gauges your blood oxygen saturation during the day and as you sleep to show how well your body is absorbing oxygen.
Real-time Heart Rate Monitor: The advanced sensors of DIZO Watch can automatically monitor your heart rate status and provide you with a heart rate report giving you a better understanding of your health.It also helps gauge how hard you work during activities — even while swimming.
Sleep Score & Advanced Sleep Monitoring: This Dizo watch always pay attention to your physical health. Get a full picture of how you’re sleeping, with a breakdown of your light, deep and REM sleep stages as well as heart rate, stress, Pulse SpO2 and respiration data.
100+ Watch Faces to Change: More than 100 watch faces are available, you also can customize your own watch face.
5ATM (165 ft.) Waterproof: You can swim without worries. 5ATM will withstand pressures equivalent to about 50 meters, or 164 ft under water. It is way better than IPX8 or IP68.