Product Overview: The WHOOP 4.0 Wearable Health & Fitness Tracker monitors fitness and health metrics with real-time insights, including a 12-month subscription for data access and analysis. Key Features: ‣ Tracks health metrics (heart rate, sleep, recovery). ‣ Water-resistant and lightweight. ‣ Includes 12-month subscription to WHOOP app for insights. Technical Specifications: ‣ Material: Durable plastic and fabric strap. ‣ Dimensions: Adjustable to fit most wrist sizes. ‣ Compatibility: WHOOP app on iOS and Android devices. Warranty 1 Year Warranty direct from Whoop Company , not from Technical Care Center Warranty claim can be process through the Whoop Application Subscription Guidelines 12 months membership included ( automatically added on activation ) credit card is needed upon activation in the Whoop app automatically $30 will be charged one time. it's a reservation fee for the 13th month after the free membership expired after the 13th month, it will be your decision to continue with the service or cancel it