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1pc Portable Finger Pulse Oximeter: Heart Rate Monitor - This tool does not include batteries!(Use AAA battery,Distinguish between positive and negative battery terminals ) Christmas, Halloween, Thanksgiving Day Gift | SHEIN USA
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Amazon.com: Clinical Guard CMS-50DL SpO2 Pulse Oximeter Fingertip, Blood Oxygen Saturation Monitor with Heart Rate Tracker, Fingertip Pulse Oximeter with Batteries, Silicon Cover & Case, Lanyard, Blue : Health & Household
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