Polar H10 - H9 Verity Sense Heart Rate Sensor Waterproof, Replaceble Battery

COMFORT: Polar Verity Sense keeps your wrist free for maximum comfort and freedom of movement. Just slip it on your upper or lower arm, clip it on your swimming goggles or place it snug and firm against your skin under tight-fitting clothing. CONVENIENCE: With only one button, using Polar Verity Sense couldn't be easier. Only 3cm wide, and less than 1cm thin: it’s hard to believe that something so tiny could hold such immense power. MULTIPLE CONNECTIVITY OPTIONS: Live heart rate broadcasting, 2 simultaneous Bluetooth channels, limitless ANT+ connections, and compatible with a host of 3rd party apps. VERSATILITY: Polar Verity Sense suits countless different sports (fitness, CrossFit, boxing, tennis, yoga, gym and other). You can either follow your heart rate in real time on a connected device or app or record your session and transfer your data to your phone afterwards. SWIMMER'S BEST COMPANION: Polar Verity Sense tracks your heart rate, distance and pace automatically in the pool.