Homedics 
Model PX-131CO
 
Measure and monitor your blood oxygen saturation level, pulse rate and strength with the HoMedics® Pulse Oximeter. One-touch operation makes for an easy-read with the high-brightness OLED display. Automatic shut-off preserves battery life with low power consumption featuring a low battery indicator. Intended for adult use in sports and recreational settings only.
 
Key Features:
Monitor Blood Oxygen Saturation and Pulse Rate
Pulse Strength Indicator
One-Button Operation
High-brightness OLED Display
Low Power Consumption
For use with Sporting activities
Low Battery Indicator
Automatic Shut-Off
2 AAA Batteries Included
For Adult Use Only
 
Dimensions
Width 3 cm(1.18 in)
Height 5 cm(1.97 in)
Depth 4 cm(1.57 in)
Weight 0.03 kg