Suunto Smart Sensor BLE HR Black

The most comfortable heart rate sensor, perfect for multisport. It records your heart rate where use of smartphones or watches are not convenient such as swimming.• Compact, comfortable fit
• Real-time heart rate and calories burned
• Compatible with Suunto Movescount App, sports apps for iPhone, Android, and Bluetooth Smart devices
• Water resistant to 30m / 100ft
• User replaceable battery
• Software upgradeable
• Adjustable strap length; minimum length 640mm, maximum length 940mm
• Strap width 30mm