Features： 1、Essential Health Check: Pulse oximeter is a device that measures blood oxygen saturation levels, an important indicator of overall oxygen levels in the body. 2、Comprehensive Monitoring: Oximeter can display blood oxygen saturation levels, pulse rate, and average pulse value. It is portable, lightweight, and easy to use. 3、Adjustable OLED Screen: Screen automatically adjusts a colorful OLED display that simultaneously shows test results and pulse waveform. It also has a low voltage visual alarm function and real time battery voltage indicator. 4、Suitable for All Ages: From children to adults, fingertip pulse oximeter is suitable for monitoring blood oxygen saturation levels and pulse rates in a wide range of ages and health conditions. 5、Accurate: With a simple fingertip placement, oximeter provides accurate and convenient measurements, allowing you to monitor your health anytime, anywhere. Specification： Item Type: Fingertip Pulse Oximeter Material: ABS Batteries: 2pcs AAA batteries (not included) Color: Green Package List： 1 x Oximeter 1 x Lanyard 1 x Instruction Manual