Description: Unlike other similar products, the Bluetooth-compatible heart rate sensor chest belt can be used to exactly and accurately monitor your heart rate, maximizing your exercise results. Great for various kinds of activities, like running, jogging, cycling, etc. Our Bluetooth-compatible heart rate sensor has an ability to resist water and dust when exercising. And more, these lightweight chest belts would not cause too many burdens, offering you comfortable wear feeling. It is constructed of plastic material. The length of this product is 6.23cm, width is 3.51cm and height is 1.15cm. This product is perfectly suitable for camping, running, jogging, cycling, etc. Item Name: Heart Rate Sensor Material: Plastic Battery: 1 x CR2032 Battery(Battery Included) Battery Capacity: 240mAh Nominal Voltage: 3.0V Operating Temperature: Minus 20 Degree Celsius-60 Degree Celsius Size Details: 6.23cm x 3.51cm x 1.15cm/2.45" x 1.38" x 0.45" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Heart Rate Sensor