The Garmin Edge 25 captures essential stats from your ride like time, distance, speed, total ascent & location. Easily paired with a heart rate strap & cadence sensor (Heart Rate Monitor Sold Separately), so you can record your heart rate & heart rate zone, Heart rate compatibility also provides more accurate calories burned information during your ride. Monitor your pedaling cadence as you ride with this easy-to-install wireless sensor. Easy to fit the cadence sensor fastens to any crank arm size & measures pedal strokes per minute so you can get the most out of your training.