Timex Ironman T5J985 Unisex Trail Runner Bodylink Heart Rate Monitor Watch Combines GPS location data with heart rate monitor for serious runners Provides latitude and longitude, altitude/elevation data; record up to 10 waypoints for Track Back Chest strap heart rate monitor provides target zones with alarm and time in zone 100-hour chronograph; 100-lap memory; 5 alarms Watch is water resistant to 50 meters (165 feet); up to 2-year battery life