Are you stronger than electromagnetism? O2 Magnetic Dumbbells, a pair of rings with embedded electromagnets, work in tandem to generate resistance as their ends repel, and challenge users to build muscle by fighting their force.
O2 electromagnets have adjustable, user-controlled strength settings for use in a variety of exercises, and by people of all fitness levels. Training weights range from 3 to 24 kg (6.6 to 53 pounds), and the rings' digital display also tracks reps. A compact nature and versatility make these dumbbells easy to transport, and therefore excuses for not working out while traveling, when the weather is too shitty to drive to the gym, or as you're waiting in line at William Shatner's next book signing more difficult to come by.
O2 Dumbbells were designed by Suhyun Yoo, Hongseok Kim, and Juhyeon Lee.