Smartheart Pulse Oximeter

Safely monitor your pulse rate and oxygen saturation levels with one-button operation. A red digital readout displays on its large LCD display. Accommodates a wide range of finger sizes, circum. approximately 20-75mm. Automatic shut-off and low-battery indicator. 2 AAA batteries included, plus a quick-release lanyard. 2.64″L x 1.34″W x 1.23″H.