Nautilus, Inc. has revolutionized the strength category with the first-ever smart dumbbells. The Bowflex® SelectTech® 560 Dumbbells are the only home strength product with built-in brains to guide users through exercises while tracking reps, sets, calories burned, and providing feedback on form. Based on customer feedback, our design team engineered a one-of-a-kind product that offers a fully interactive experience to work out harder and smarter: Integrated and proprietary 3DT built-in electronic sensor records reps, weight lifted, and provides an audible cue when users complete each rep properly. Information can be seen on the dumbbell screen or connected app via a tablet or mobile device. 3DT app features a full library of video exercises and allows users to set and track goals, progress, calories burned, share results with friends and more via Bluetooth® technology to mobile devices. Replaces and entire rack of dumbbells. Space-saving, ergonomic design reduces the number of separate dumbbells from 32 down to only two. Changing the weight is as easy as twisting the handle. Adjusts weights incrementally from 5 to 60 pounds to create a customized strength workout.