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Amazon.com: Santamedical Dual Color OLED Pulse Oximeter Fingertip, Blood Oxygen Saturation Monitor (SpO2) with Case, Batteries and Lanyard : Health & Household
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Amazon.com: ChoiceMMed Dual Color OLED Finger Pulse Oximeter - Green - Blood Oxygen Saturation Monitor with Color OLED Screen Display and Included Batteries - O2 Saturation Monitor : Health & Household
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