Polar FT4M Heart Rate Watch and Training Monitor
Polars FT4M training comuter - For those who want basic heart rate-based features to keep their fitness training simple.
This monitor shows when you re improving fitness based on your heart rate.
Also Displays calories burned. To help you train safely and effectively the training computer automatically determines your heart rate target zone limits according to your age-based maximum heart rate. Battery Required (ONE CR1632 included).
Materials: Rubber wristband/electronics.
Dimensions: 5"L x 4"W x 3"H
Weight: 0.4 lbs.