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