Compatible with whoop 5.0 One, Peak & Life (MG): Specifically designed for whoop 5.0 models including One, Peak, and Life (MG). Please note: NOT compatible with whoop 4.0 or earlier versions. Although compatible with Life, ECG readings are recommended to be captured using a wrist-worn accessory. Ideal for Multiple Usage Scenarios: This fitness arm band is suitable for workouts, daily wear, and specialized tasks - perfect for athletes, professionals, and anyone wanting a secure, wrist-free tracking option. Breathable Nylon with Adjustable Fit: Made from premium breathable nylon material that provides exceptional comfort. The 38cm (15in) length offers fully adjustable sizing for a perfect fit. Easy Tool-Free Installation: Simple to install without tools and features one-click disassembly. The band securely locks your tracker in place, eliminating any risk of falling off during activities. Important Note & Customer Support: Please note: Whoop 5.0 device is not included (only band and U-clip included). If you encounter any issues during your purchase, please feel free to email us - we guarantee to help resolve any problems. Specifically designed for Whoop 5.0 models including One, Peak, and Life (MG). Please note: NOT compatible with Whoop 4.0 or earlier versions. Although compatible with Whoop Life, ECG readings are recommended to be captured using a wrist-worn accessory.