https://www.cnet.com/news/smart-kettlebells-will-get-you-in-shape-at-ces-2019/ > The coolest part is the adjustable weights. Press the plus or minus buttons to change the weight in 6-pound increments from 12 to 42 pounds. Watch the weight increments adjust on the display.  > The related app helps you track your reps and can even help you customize your workout.