Compact appearance, more convenient to carry.A button to wake up,
even the elderly can also be used simply.Two 1.5V AAA batteries can
be used continuously for more than 15 hours, more environmental
protection and saving.
Heart beats per minute while at rest tells a lot about your internal
health and fitness levels. It is a strong indicator of your risk for
heart problems.
Your body requires a very precise balance of oxygen in the blood.
For your body to perform optimally, blood oxygen levels should
be above 95%.
