The space obstacle prevents many of us from carving out room in our humble abodes to create a home gym. Individual kettlebells are great for symmetric muscle building and toning, but cost and rack space are big hurdles to overcome. But JAXJOX KettlebellConnect has a brilliant answer. It’s a single but very ergonomic kettlebell that adjusts weight between 12 and 42 pounds (12, 18, 24, 30, 36 and 42-pound increments) in mere seconds. Simply press the button on the housing unit’s console, and you can see the weight displayed accordingly. No need for multiple units because this does the duty of six of ’em. It also has its own app that connects via Bluetooth 4.0 and tracks everything including reps, sets, weight used, as well as rest periods. It will even provide you with your Fitness IQ that aggregates the data and shows you if you’re nipping at Dwayne Johnson’s heels or only suited to bring him a towel.