Comfortable chest strap for heart rate measurement compatible with Polar and Wahoo devices. The smart fusion of soft fabrics and adaptive electrodes ensures high sensitivity. As an essential component of a heart rate monitor, it accurately detects and transmits real-time heart rate data to your smartphone. One of the most popular heart rate belts worldwide, designed for ease of use and long-lasting durability. Features a snap attachment system. This lightweight garment is compatible with all heart rate sensors supporting ANT+ and Bluetooth 4.0. Made from high-quality materials, the chest strap fits securely and closely to the skin. Effectively captures the heart's electrical signals, enabling faster and more accurate heart rate detection. Designed to fit models with 45mm spacing between buttons and 5mm center-to-center distance. Material: Silicone + fiber Color: Black Package Contents: 2 x Adjustable Elastic Strap Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color compared to the actual item. Measurement error allowance is +/- 1-3 cm.