In order to reach your healthy lifestyle goals, it is important to know and understand your blood oxygen saturation. This oxymeter is simple to use. Once fingertip is placed in the padded clip and power is switched on, the oximeter will begin measuring blood oxygen levels and pulse. Main Features:Care for health: Convenient to measure blood oxygen levels and pulseBlood Oxygen Saturation Monitor TesterHigh-speed sensor: Built-in high-speed sensor, only 8 seconds, you can read the measurement resultsAuto power off: The oximeter turns off automatically 10 seconds after finger is removed, good for energy conservation High quality: The oxy meter is crafted from high quality, lightweight materials, durable and portableCompact size: Mini and portable body, easy to use at home or carry in your tripSuitable for: Kids and adultsPower: Works with 2 AAA batteries ( not included )How to use:Blood oxygen saturation and pulse rate are measured with the touch of one button.Please add the powered by 2 x AAA batteries ( not included ) and just put your one finger into the oximeter that the data will display on the screen.