Why We Love It Keep tabs on your heart rate with Wahoo's new TRACKR chest strap. Slim, soft and secure, this comfortable chest strap features an advanced detection algorithm to deliver real-time heart rate data and support peak performance.   Talk Nerdy To Me With heart rate variability (HRV) data available via a compatible app, Wahoo's TRACKR heart-rate monitor provides comprehensive insights into your training. It connects to smartphones via Bluetooth and ANT+, and syncs with all your fave training apps and accessories. Over 100 hours of active battery life means you're always ready to train, too. Check the Wahoo App for average heart rate, beats per minute, max heart rate and total calories.   Fast Facts - Over 100 hours (active use) of battery life - Sweat-proof and IPX7 water rating  - Adjustable from 27" to 36" (68–91cm)  - Fits up to 50" (127cm) chests - ANT+ and up to three Bluetooth connections - Includes: TRCKR heart rate pod, TRCKR heart rate strap, charging cable