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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
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Finger Pulse Oximeter [BM1000] : ID 4580 : $19.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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