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.
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.
- BRIGHT AND SUPER EASY TO READ. CRYSTAL CLEAR NUMBERS.