WHOOP is an innovative wearable fitness device that provides continuous tracking of key physiological metrics, such as heart rate, respiratory rate, resting heart rate, heart rate variability, skin temperature, blood oxygen levels, daily activity, and sleep. By offering real-time insights, it helps users gain a deeper understanding of their overall health and wellness while monitoring their progress over time. Excellent Condition Included with purchase: -Whoop 4.0 device -Black hydroknit band -Pink hydroknit band -Battery Pack -Charging Cable