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Amazon.com: Care Touch CTOM Fingertip Pulse Oximeter with Lanyard for Measuring Pulse Rate and SP02, White : Health & Household
Amazon.com: Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor Pulse Ox, Heart Rate and Fast Spo2 Reading Oxygen Meter with OLED Screen Included Lanyard and 2 X AAA Batteries : Health & Household