Comfortable and adjustable elastic strap 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 Compatible with different heart rate sensors (ANT+, Bluetooth 4.0, 5.3K) Comfortable chest strap for heart rate measurement compatible with Polar, Wahoo, Garmin products. The smart fusion of soft fabrics and adaptive electrodes make it extremely sensitive to Being an indispensable part of heart rate monitor, it will detect and send your real-time heart rate to the smart phone accurately. The most popular heart rate belt in the world easy to use yet is very durable. Utilizes the snap attachment method. With the chest strap based on high quality material, it can be attached to your skin closely.Utilizes the snap attachment method Model Number: Magene Heart Rate Chest Strap Two snaps Distance: Approx. 45mm (please check the distance of your mitter and confirm the compatibility) Colour:black Material:Nylon/Polyurethane Size:Length about: 98cm Package Contents: 2x Adjustable Elastic Strap Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!