Finger Pulse Oximeter for pilots to measure pilot’s blood oxygen saturation level and pulse during flights above 8.000 ft. The FPO is solely to be used for information and monitoring purposes and is no substitution for compulsory oxygen supply needed by law when flying at high altitude.

Advantages:

Easy to use automatic on/off function, insert finger and read
Bright and easy to read OLED color display
Low power consumption – up to 30h with 2 AAA batteries
Low voltage warning
Low weight ca. 50g incl. Batteries
Automatic power off after 8 sec. if not in use
Adjustable brightness and 6 display modes

Included:

2 AAA batteries
Protecting cover made of nylon
Lanyard

Original source:
www.diamond-pilotshop.com/en/finger-pulse-oximeter.html