Monitor Your Heart Rate During Sports or Exercise This small, lightweight ring makes it easy to monitor your heart rate while on the go, at the gym or taking your morning run. Just slip it on your finger to get a continuous heart rate display without stopping your activity. It also has a stopwatch, clock and count-up timer. The monitor comes with a lanyard with safety lock, an extra battery and instructions in English and Spanish. Features Easily monitor your heart rate during sports or exercise with this small, lightweight ring. Wear on your finger or on around your neck; carry with you on the included lanyard. Continuous heart rate display (30 to 250 beats per minute) lets you monitor your heart rate without stopping activity; maximum/minimum heart rate target zone. Monitor has a stopwatch, clock and count-up timer and expandable strap that fits most sizes. Includes: case, lanyard with safety lock, extra battery, instruction manual in English and Spanish Measures 1 inch x 1 inch (2) CR2032 batteries included (one to use immediately and one extra)