A pulse oximeter is a device that clips on your finger, toe, or earlobe to measure blood oxygen saturation. Here's how it works and how to read it.

Apple's new Apple Watch Series 6 goes all-in on health care, including a new feature to measure blood oxygen level-- a vital sign that's been helpful monitoring COVID-19, among other things. Other ...

Electricity is one of life’s necessities, and being smart about it starts with learning how to use a prepaid meter. Getting a new apartment, replacing an old postpaid meter, or just being tired of ...