Amazon.com: iProven Pulse Oximeter with Heart Rate Monitor on Fingertip, Oxygen Saturation Oximeter, Includes Batteries, Case and Lanyard (Blue) : Health & Household
Pulse Plus-Heart Rate Monitor by Gomium Technology Limited
Sport and Fitness: K&R Pulse Plus Heart Rate ring
Heart Rate Plus: Pulse Monitor on the App Store
Amazon.com: Easy@Home Fingertip Pulse Oximeter SpO2 Blood Oxygen Saturation Meter and Heart Rate Monitor, Rotatable OLED Display with Batteries Included, Portable Lanyard and Carrying Package-EHP035 : Health & Household