creative-sz
https://www.creative-sz.com/products/lepu-ap-20-sleep-apnea-wrist-pulse-oximeter-bluetooth-connection/
The Lepu Medical Grade AP-20 sleep apnea pulse oximeter readings has visual and vibration alarm functions, suitable for home or medical institution environment, and can be used for sleep apnea monitoring, measurement, display, and storage of SpO2 ( blood oxygen saturation), pulse rate (PR), PI (perfusion index), and can measure snoring, respiratory rate (oronasal cannula is included in the packing list), airflow.