Whoop 4.0 Black Fitness Tracker used. With refresh kit and brand new knit band.

Track your fitness, sleep, stress, blood oxygen with the sleek Black Fitness Tracker. Stay on top of your health goals with style and precision. Used sensor. Brand new black knit band. It comes with 2 free months trial and battery and charging cable. Also a used knit beige band in separate listing . Bundle it if you’d like.