MAX30102 Pulse Oximeter and Heart-Rate Sensor for Wearable Health -
Amazon.com : Finger Pulse Oximeter and Heart Rate Monitor- Portable Blood Oxygen Level and Heart Rate Fingertip Sensor with Carrying Case and Lanyard by Bluestone : Sports & Outdoors
MAXREFDES117#: HEART-RATE AND PULSE-OXIMETRY MONITOR - Seeed Studio