Fingertip Pulse Oximeter featured walk or jog in place

walk or jog in place for 20–30 seconds

To clean it

close it again and then shake the activator bottle until all the mixture looks smooth and even in colour

or preservatives in either type

Fingertip Pulse Oximeter featured walk or jog in placeInfo: Model YK 81; Completely Black in Colour; Includes Carrying Case Pulse oximeters measure pulse rate and arterial blood oxygen saturation (SpO2) levels (the percentage of oxygen in the blood coming from the heart). The Yongrow Fingertip Pulse Oximeter is easy to use, works with ordinary penlight batteries, and can give accurate readings in just a few seconds. Product Notes: This video demonstrates a similar but slightly different oximeter model