Optimal Comfort and Compatibility: Experience unmatched comfort with our soft, adjustable chest strap designed for prolonged use. Compatible with major like for and for , this heart rate monitor chest strap ensures seamless connectivity for accurate tracking. and : Crafted from , materials, our chest strap withstands the rigors of intense workouts, making it ideal for running, cycling, and other sports activities. Easy to Use: The strap is easy to adjust and fits comfortably around your chest, providing real-time heart rate data without interfering with your activity. This product only contains chest strap, not heart rate monitoring equipment. Color:C:Black Material:nylon Package Contents: 1 * heart rate monitor chest strap Only the above package content, other products are not included. Note: Light reflection 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.