Features: 1 Year Hassle-Free Warranty. 2-Way computer communication (sold with Interface). TriZone: 3 EZ-Set target zones automatically set by age. 100 Lap Memory with 8 sec. freeze. Multiple session files fully selectable, 9 interval timers w/9 cycles. Advanced Memory: Time in TZ, Ma. and Avg. HR, calories, pacer, and HR for each, Avg. and Best Lap Times, HR Sampling 5, 15, 30, 60 sec or 5 min.