This Whoop is for new subscribers only. You must create a new account when pairing it with your phone to get the 1 year subscription. If paired with an account that has previously paired Whoop 4.0 .. the subscription will not be granted. Product Features: Includes a 1-year subscription with the wristband. After subscription ends, renew for $30/month. Note: When linking Whoop 4.0 to your phone, the app will ask for your credit card details. Why the card request? They're checking if you're ready to renew the subscription after the free one-year ends. The card should have the required amount, but no immediate charges will be made. If the card is declined during setup, try another card or ensure you have enough balance. - Precisely tracks exercises, sleep, and health habits. - Sleep tracking provides personalized analysis and goals. - Recovery score guides extra activities. - Monitors heart rate, exercise types, and calories burned. - Tracks temperature, breathing quality, blood oxygen. - Measures stress levels and mental tension. - Battery lasts around 5 days. - Charge it by placing the battery over tracker, takes about 2 hours to fully charge. - Easily remove battery for separate charging. - Strength Coach feature indicates maximum effort based on breath and muscles. - Interchangeable wristband for style change. - Join mobile app groups or create your own. - Water-resistant up to 10 meters. - Warranty: 1 year.