Features 1、[Accurate and Convenient] The pulse oximeter can accurately determine your SPO2 (blood oxygen saturation level), pulse rate (heart rate) and easily display your measurements on a large LED display. 2、[Very Important] Regular monitoring of oxygen saturation and pulse is vital to staying healthy, whether due to heart problems, lung disease or asthma, or just during strenuous exercise. 3、[Multiple Function] The large display features four graphical display formats, adjustable brightness and orientation, automatic off and low battery indicator. 4、[Simple Operation and High Sensitivity] Simple to operate and easy to use, rapid response, just clip the device to your index finger to read your vital signs in seconds. 5、[Easy for Carrying and Lanyard Design] Our fingertip pulse oximeter come with lanyard and are easy to carry, so you can keep track of your oxygen levels wherever you go. Specification Item Type: Pulse Oximeter Material: ABS Power Supply: 2 x AAA Batteries Are Required (Delivered Without Batteries) Package List 1 x Pulse Oximeter 1 x Lanyard