TIMEX IronMan Triathlon Race Trainer Pro T5K489 Heart Rate Monitor Set with Data Xchanger USB (black) Memory for 10 training units with 50 laps each with data on heart rate, chronograph and interval timer Training overview of average, peak and minimum heart rate and calories consumed No interference from other heart rate monitors and other electronic devices and power lines Chest strap 3 ATM test pressure (Chest strap does not give an accurate heart rate measurement when under water) Wireless 2-way communication between the Race Trainer ™ heart rate monitor and a PC or Mac Transfers training data to the free Timex Trainer training diary, supported by TrainingPeaks ™ You can use the Device Agent (online program) to control the settings and the memory of the clock Link to the personal downlo