The Timex® Personal Trainer® heart rate monitor delivers essential fitness management data in an easy-to-operate watch and help meet your weight loss goals! It is easy-to-view in low light conditions with INDIGLO® night-light. It’s a perfect workout companion. Heart Rate Monitor Features Flex-Tech™ analogue sensor works with most heart rate-enabled gym and fitness equipment Water Resistant: Yes, Up to 30m Automatic elapsed timing Average/peak heart rate, and calories burned workout data