VDO Z2PC Link Heart Rate Monitor and Cycle Computer with PC Syncing Cable and Training Analysis Software Wrist-style cycling computer with heart rate monitoring Download data to PC for analysis with included software; USB docking station; compatible with Windows XP/Vista Current heart rate in % of personal maximum heart rate; audible signal if above or below limit settings Two presettable wheel circumferences, six selectable timers; lap-timer for 50 laps Backed by 5-year warranty