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COLMI C61 1.9inch Waterproof Bluetooth Calling Smart Watch The COLMI C61 features a 1.9" touch-control display. It uses the main chip of RTL8762D. It adopts BT 5.1 Low Energy technology, which reduces power consumption by 20% and the transmission rate by 30% compared with the previous generation technology. It has 19 exercise modes, a stopwatch, and a sports data report. In the health mode, it has a 24/7 Heart Rate monitor, BP monitor, Spo2 monitor, Sleep tracker, and Breath monitor. The smartwatch also includes smartphone notifications, an alarm clock, support for custom watch faces, high-sensitivity microphones, a Hi-Fi speaker, and a phone call function. A 230 mAh battery powers the smartwatch. All-day Heart Rate Monitoring and SPO2 Tracking The C61 adopts a new blood oxygen chip, which uses red light to measure blood oxygen, and the data is more accurate. It comes with a VP60A heart rate sensor. You can easily monitor your heart rate 24 hours a day with your health in mind. You can also view recent heart rate data through a mobile App. It also supports testing your blood oxygen level at any time, so you can get a better understanding of your physical condition. lP67 Rated Waterproof The COLMI C61 Smart Watch comes with IP67-level protection, so it can be worn when washing hands, raining, exercising, and sweating. You don't have to worry anymore about the smartwatch...