VDO Z3 Altimeter, Heart Rate Monitor and Cycle Computer Wrist-style cycling computer with heart rate monitoring and integrated altimeter Displays current altitude and gradient in %; altitude/distance gain uphill on current trip 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