Amazon.com: LIVIN Fingertip Pulse Oximeter w/ Pulse Rhythm Analysis, Highly Accurate Blood Oxygen Saturation Monitor for SpO2 Level & Heart Rate, Alarm & Memory Function, Auto ON/OFF, Lanyard & Batteries Included :
Contec CMS50DL Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor (SpO2) with Pulse Rate Measurements and Bar Graph, Digital LED Display, Blue - Walmart.com
Amazon.com: Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor (SpO2) with Pulse Rate Measurements and Pulse Bar Graph, Portable Digital Reading LED Display, Batteries and Carry Case Included : Health & Household