Polar FT4 Women's Heart Rate Monitor: This water-resistant heart rate monitor and watch system automatically display your target zone to keep you on track with your workout routine. Continuous heart rate measurement and OwnCal technology make it easy for you to stay within your goals.
Add an extra level of security to your vehicle with this Directed Electronics ball-bearing tilt switch. The easy-to-install wiring connects to your vehicle's alarm system. This Directed Electronics ball-bearing tilt switch is compatible with most Directed Electronics alarms (not included).
Polar FT4 Women's Heart Rate Monitor: This water-resistant heart rate monitor and watch system automatically display your target zone to keep you on track with your workout routine. Continuous heart rate measurement and OwnCal technology make it easy for you to stay within your goals.
Do you have to wear the chest strap to monitor your heart rate?
Yes . If you don't where the chest strap the watch will not be able to pick up your heart rate