Compatibility: interchangeable strap for Polar, , and , Atletica, V6, compatible with the Polar order H1 H2 H3 H6 H7 and Polar Pro thanks to the support of the 45 mm standard.Reliability: walking, light jogging or long distance? Keep an eye on your heart rate and read your heart rate history on your mobile phone, app or watch. If you train regularly, we recommend you add an additional chest strap.Comfortable: With great attention to detail, we have set ourselves the goal of exceeding your expectations every day with a hand-selected selection of high-quality materials and superior product features compared to competitors.Technology: Our team supports you when connecting the strap as well as choosing the right app. Easy to adjust and put on.Buckle distance: 45mmMaterial:ABScolour:BlackPackage Contents:1 * sports chest strapOnly the above package content, other products are not included.Note: Light 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.