Huami has launched the Amazfit Pop smartwatch in China for a surprisingly low price: 349 yuan (US$52). The bright and breezy wearable features non-medical grade monitors for blood oxygen saturation, atrial fibrillation, sleep quality, and 24-hour heart-rate monitoring. The Amazfit Pop comes in a choice of three colors and is water resistant.
https://www.notebookcheck.net/Huami-Amazfit-Pop-smartwatch-launched-Flagship-features-such-as-blood-oxygen-level-measurement-and-atrial-fibrillation-monitoring-for-just-349-yuan-US-52.498790.0.html