Polar FT7 Heart Rate Monitor Watch Wristband Size : 8  . NOTE - Measurements taken from the LAST HOLE to the END OF RUBBER next to buckle (not from end to end). Wristband Size : 8  . NOTE - Measurements taken from the LAST HOLE to the END OF RUBBER next to buckle (not from end to end). Watch and heart rate monitor ideal for active types interested in monitoring their fitness level based on heart rate Innovative Energy Pointer feature graphically displays real-time information during workout, letting you know if you're burning fat or improving aerobic fitness Own Cal calculates number of calories expended during a training session based on weight, height, age, gender and maximum heart rate Comes with Polar FT7 training computer, Polar WearLink+ transmitter and FT7 Getting Started Guide Includes limited two-year manufacturer's warranty