Install Battery:

Installing two AAA batteries into battery cassette in correct polarities and cover it.

WARNING: Do not attemp to recharge normal alkaline batteries, the may leak and may cause a fire or even explode.

Turn the pulse oximeter on/off

Put one of fingers into rubber hole of the oximeter(it is best to put the finger thoroughly) with nail surface upward, then releasing the clamp.

To learn more, Please click NEW SLEEP MONITORING OXIMETER MANUAL