The Wellue Checkme O2 Max Wrist Pulse Oximeter is a reliable and high-quality device for monitoring your oxygen levels. With its digital display and Infrared sensor technology, you can easily see your oxygen levels at a glance. The rechargeable battery ensures long-lasting use, and the built-in alarm will alert you if your oxygen levels are low. This wrist pulse oximeter is CE marked making it a trustworthy choice for your health and well-being.