Note:Only one strap for heart rate monitor to help transporting data and no bluetooth functionFeatures:- High quality， high electrical conductivity.- Comfortable and adjustable elastic strap.- Easy to use， durable， highly efficient and stable.- With the chest strap based on high quality material， it can be attached to your skin closely.- Soft fabrics and adaptive electrodes make it extremely sensitive to your heart's electrical signals.- Utilizes the snap attachment method.- Suitable for Polar， Wahoo， Garmin products.- Resistance: Less than 2K.- Length between two holes: 45mm.- Extended strap length: 1m.- Extended ratio: 1 : 2.2. Type: 4115 Material: Nylon Color: Black，Blue，Light blue，Orange，Pink Package weight: 0.069 kg Package Size(L x W x H): 6.300 x 16.800 x 2.300 cm / 2.480 x 6.614 x 0.906 inches Package Contents: 1 x Sport Heart Rate Strap Band Chest Belt for Garmin Wahoo Polar It is an indispensable part of heart rate monitor. It will detect and send your real-time heart rate to the receiving terminal accurately. Suitable for a variety of ANT+， smartphone， bluetooth receiving heart rate equipment ( heart rate monitor watch， sports equipment， heart rate receiver， exercise bike， treadmill and so on ).