Wellue Fingertip Blood Oxygen Saturation Monitor w/ Alarm & Bluetooth $27 at Amazon
Amazon with Sensebody has the Wellue PC-60FW Fingertip Blood Oxygen Saturation Monitor (Bluetooth Version) with Alarm, Batteries, Carry Bag & Lanyard for $50 - $23 off with code
8KZ62Q97 [Exp 8/23] =
$27 with free shipping.
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