The ViATOM Checkme O2 Pulse Oximeter Bluetooth Sleep Monitor is a comprehensive health monitor that you can connect to your smartphone using Bluetooth technology. This device provides not only oxygen saturation readings but also heart rate tracking with high accuracy. Its small and lightweight design makes it easy to carry along, ensuring you can keep an eye on your health wherever you go. The O2 Pulse Oximeter Sleep Monitor goes beyond just monitoring oxygen levels and heart rate, it also tracks sleep stages for better insights into your sleep patterns and quality. It then syncs with your smartphone to give you personalized health data, helping you make informed decisions about your health.