Accurate and reliable- The Oximeter determine your SpO2 heart rate and heart strengthin 5 seconds and display it conveniently on a large digital OLED display accurately. Light & small- The product is small in volume,light in weight(total weight is about 50g including batteries) ，comes with a lanyard and convenient in carrying. Sport/health enthusiasts- Suitable for sports enthusiasts like mountain climbers, skiers, bikers or anyone interested in measuring their SpO2 and heart rate. Wide rang of applications & long battery life- Light and compact, accommodates wide range of finger sizes, long battery life, automatic power off after 5 seconds. Suitable for all ages- Accommodates wide range of finger sizes - children to adult.