Designed for fitness enthusiasts and weekend warriors alike, the digital Timex Ironman Road Trainer heart rate monitor is an essential workout companion that makes a bold style statement. Preset your desired heart rate exercise zone an alarm will warn you when you have gone of your zone. Average heart rate is given for total workout, for each lap and for total time in your zone. Provides total calories burned and displays percentage of maximum heart rate. Recovery heart rate timer measures your heart rate after a timed recovery, during or after your workout. Maximum heart rate zone calculation automatically sets your 5 training zones 1 manual zone included. Digital transmission protects your data from cross talk with other heart rate monitors and electronic interference from exercise equipment. Data Recorder 2 and Data Recorder compatible. Water-resistant hatch in heart rate sensor accommodates quick and easy battery changes. INDIGLO night-light illuminates the display for easy use at night. 100-hr. chronographs with lap and split options. 50-lap memory with average heart rate per lap. 100-hr., 2-mode countdown timer. Includes heart rate sensor with adjustable chest strap.