• Premium heart rate strap transmits real-time heart rate data via ANT+(R) technology and Bluetooth(R) Low Energy technology to communicate with Garmin(R) devices, compatible fitness equipment, and online training apps, such as Zwift;• Captures running dynamics, such as vertical oscillation, ground contact time, stride length, vertical ratio, and more;• Stores heart rate data during swimming or other activities out of range of Garmin(R) watch then automatically sends data to the watch when the activity is finished;• Stores steps, calories, intensity minutes, and heart rate then syncs to compatible Garmin(R) watch when in range ;• Small, lightweight heart rate monitoring module is no wider than the width of the soft, comfortable strap;• Battery life: up to 1 year;• Includes documentation;Length: 6.80"Width: 2.90"Height: 2.40"Note: Due to the existence of lithium batteries, additional shipping charges or restrictions may apply. Shipping restrictions may require a ship method that is limited to GROUND and this may impact time in transit and available delivery locations.;