NOTE: We have THREE different options for you to choose from in this listing:
1. Two AAA batteries only
2. Pulse Oximeter with NO BATTERIES included (save if you have your own 2 batteries)
Pulse Oximeter with 2 AAA batteries included (ONLY a tiny bit more for
the two batteries to be included, may just be cheaper than you can get
your own batteries for!)
Helpful Tip with those with thick fingernails or nail polish on them: this is good for ANY pulse oximeter. If you don't get a reading at first, flip the pulse oximeter upside down and take a reading from the underside of your finger.
If you do not slide your finger completely in and keep it still, the measurement may be inaccurate.
If you find it coming on OK, but then turning off for no reason, try replacing the batteries. That is usually a sign that it is time to change the batteries.
IMPORTANT: when putting in the batteries, as with most small pulse oximeters of this size, to save space they have an unusual battery placement in the battery compartment, note ONE battery goes with the + against the spring, or it will NOT turn on. See battery diagram when you open the battery compartment.
IMPORTANT: Be sure to peel off the protective film over the screen or it WILL be blurry!