Quickly and accurately captures SpO₂ and pulse-rate measurements from any angle, even on patients where low perfusion is a challenge. Portable and lightweight, this unit works on pediatric and adult patients and can be used on fingers, thumbs, and toes. Automatic turn on and off. Comes with 2 AAA batteries, which provide up to 6,000 spot checks before needing replacement. Three-color pulse-quality indicator LED light provides a quick assessment of patient pulse quality. 4-year warranty.