The Kettlebell Connect is a smart kettlebell that can do the work of six kettlebells. Within its companion app, you can select the weight of the kettlebell in a matter of seconds. The app controls internal weights, from 12 to 42 pounds, that are added and removed appropriately in a matter of seconds. The app also keeps tracks of reps and your movement. For anybody with a home gym, this is a great space saver.