Easy to use, simply insert an index finger into the Pulse Oximeter and then press the button to activate the device. Featuring a light-emitting diode led, it parses and displays the percentage of saturation oxygen in blood SpO2 so the value of heart rate (pulse), the results are updated every second. The brightness of the screen is also adjustable. Read the SPO2 oxygen saturation rate and pulse is always easy. Compact and lightweight, this Pulse Oximeter is easily transportable. It will turn off automatically after 8 seconds if no finger is inserted. Features and Benefits Advanced accuracy & reliable - Accurately detect your SpO2 (blood oxygen saturation levels), pulse rate and pulse strength. Suitable for different uses - Awesome for people with respiratory conditions, heart conditions and more. Perfect for exercise enthusiasts, athletes, and those who need to monitor Blood Oxygen Circulation and Heart Rate. Modern OLED display - This finger pulse oximeter allows changing the direction of reading, no need to read upside down. Most blood oxygen finger meter only show the readings in one direction so you have to twist and turn your hand to read the screen. User-friendly - Just clip it onto a finger and press the button to start monitoring. The inside of the oximeter that clips onto the finger is soft and gentle with the use of silicone type material. Alarms can be recorded if you get a number of what is a low or high pulse for you. Specifications Suitable for all ages: Fits child to adult all finger sizes Reliable accuracy & durability Two Color OLED Display, four display modes 4-Direction Display adjustable Low voltage indicator, Real-time spot-checks Low power consumption,50 hours continuous to work Low Perfusion ≤0.4% Automatic power off when no signal Widely used in home healthcare, oxygen bar, alpine area, sports healthcare etc Note: The product is not suitable to monitor a patient continuously. Requires 2 standard AAA batteries: Batteries are not included SpO2 range 70-99 / Accuracy ±2% between 70-99%, unspecified