Zacurate® 500BL Sporting/Aviation Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with batteries and lanyard included (Navy Blue) - Walmart.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