Description: The tissue oxygen monitor is a portable device designed to measure oxygen levels in the tissues of the human body. This type of technology is based on near-infrared spectroscopy (NIRS), which allows for non-invasive assessment of oxygen saturation in tissues. Unlike pulse oximeters, which measure oxygen saturation in the blood, tissue oxygen monitors provide more detailed information about oxygenation at the cellular level. These devices are compact and lightweight, making them ideal for use in various situations, from clinical settings to athletic environments. Their relevance lies in the ability to offer real-time data on the user’s health, which can be crucial for preventing health issues and optimizing physical performance. Additionally, many of these devices are designed to integrate with mobile applications, allowing users to track their health over time and receive alerts about significant changes in their oxygen levels. In summary, the tissue oxygen monitor represents a significant advancement in health monitoring, combining advanced technology with ease of use to improve the quality of life for its users.