A heart rate monitor replacement chest strap belt is included. With the chest strap based on high quality material, it can be attached to your skin closely. Chest Strap Belt Compatible with heart rate sensors (ANT+, Bluetooth 4.0, 5.3K) of Wahoo, Garmin & CooSpo products. Easy to use, durable, comfortable and adjustable elastic strap. Please note that this product is a replacement chest strap. Soft fabrics and adaptive electrodes make it extremely sensitive to your heart's electrical signals. Product length 65 to 98cm. The distance between the center points of the two buckles is 4.5 cm. Chest strap ONLY, heart rate sensor is NOT included. If you have any problems while using our products, please feel free to contact us via Amazon email, we will give you a satisfactory answer.