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

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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 fitness watch sensor gauges your blood oxygen saturation during the day and as you sleep to show how well your body is absorbing oxygen.
164 ft. (5ATM) Waterproof: You can swim, dive or surf without worries. Watch is 5ATM (equals to 164 ft. or 50 meters) Waterproof, which is way better than IPX8 or IP68.
Real-time Heart Rate Monitor : The advanced sensors of DIZO activity tracker 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.
100+ Watch Faces to Change: More than 100 watch faces are available, you also can customize your own watch face.
Sleep Score & Advanced Sleep Monitor: This Dizo smartwatch 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.