- A new generation of heart rate sensors, thinner, more power-efficient, accurately monitor your movements, a new generation of heart rate sensors, thinner, more power-efficient, and accurately monitor your movements. SPECIFICATIONProduct Contents: Sensor × 1, Chest Strap × 1, CR2032 battery × 1Unit size: 61.9*34.3*10mm Supported chest size: 64-86cm (±2cm) Heart rate unit: bpmHeart rate accuracy: ±1bpm Battery life: 1000 hours Wireless Interface: Bluetooth 4.0, ANT+ Battery Model: CR2032×1Heart rate range: 30-240bpm Waterproof level: IP67 splash proof