i think this is a good product but you did not explain in details on how the product works..
RE: nonin 8500 EMS - Handheld Pulse Oximeter
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nonin 8500 EMS - Handheld Pulse Oximeter
nonin 8500 EMS - Handheld Pulse Oximeter
i think this is a good product but you did not explain in details on how the product works..