MOYEAH Sleep Aid Watch Monitor Heart Rate SpO2 Pulse Oximeter Anti Snoring Alarm Wireless Bluetooth for OSA - Black [A104792861344517712PB]- US$116.94 - PlusBuyer.com
The Galaxy Watch can alert you if your heart rate is too low or high - SamMobile
FL310 Pulse Oximeter with Vibration Alarm for iOS and Android
Amazon.com: Vibeat Oxygen Meter Fingertip Pulse Oximeter with Alarm, O2 Sat Monitor Finger for Oxygen, Check Blood Oxygen Saturation Level (SpO2), Heart Rate and Perfusion Index at Home, with Batteries, Lanyard and
Technical difficulties in heart rate monitors may cause irregular numb – Human Kinetics