This Heart Rate Belt features a comfortable and soft strap made of nylon and spandex, ensuring over 15 hours of comfort for walking, light jogging, or long-distance running. It displays heart rate history on your mobile phone, app, or watch, making it easy to monitor and record your workout performance. With easy-to-adjust and stretchable universal size up to 100 cm, the strap is great for both men and women. It is waterproof and sweat-resistant, and the quick-connect electrode is protected by a soft-touch, waterproof, and sweat-proof rubber coating. Fully washable (not suitable for swimming). Features 1. Super comfortable and soft strap: Made of a blend of nylon and spandex, our strap is specially designed for more than 15 hours of comfort. 2. 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. 3. 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. 4. Technology: Our team supports you when connecting the strap as well as choosing the right app. Unisex universal size , stretchable to 100 cm. Easy to adjust and put on. 5. Waterproof, friction-free soft rubber: The quick-connect electrode is protected by a soft-touch, waterproof and sweat-proof rubber coating. Fully washable (not suitable for swimming). Specification Material: Nylon Color: Black, Red, Pink, Gray, Blue, Yellow, Orange, Dark blue Size: 1m Weight: 40 g Package Include: 1x Chest Strap(Belt only without black sensor)