This Contec CMS50D is the most popular saturation meter of the brand Contec. This CMS50D is very easy to use and works by means of a so-called finger clip. Besides saturation, this meter also measures your heart rate.
Works with 2x AAA battery (not included)
Energy efficient: 36 hours of non-stop measuring
Weight: ± 62 grams
Also shows heart rate
Inclusive of hanging cord