BUILT-IN MEMORY: Store 1 heart rate training session. Perfect for sports and activities where a wrist unit would be difficult to use.

GoPro COMPATIBLE: Pair your H10 heart rate sensor directly to the GoPro Hero 5 compatibility camera and overlay your heart rate data onto the recorded video.

UPDATEABLE FIRMWARE: Firmware updates that enhance the functionality. Operating temperature -10 °C to +50 °C / 14 °F to 122 °F
ENHANCED BATTERY LIFE: 400 hours of operation time on a user replaceable

Fits chests measuring 22 to 34 inches. COMFORTABLE FIT: Revised strap design provides the comfort and security needed when exercising.

Compatibility with iOS mobile devices iPhone 4S and later and Android mobile devices with Bluetooth 4.0 capability and Android 4.3 or later