Just like all Bowflex SelectTech dumbbells, with just the turn of a dial you can automatically change your resistance from 10 lbs. all the way up to 90 lbs. of weight. No more picking up 17 different sets of dumbbells to give you the results you want! Keep working out with JRNY wherever you go from your phone or tablet; try the Mobile-Only Membership free for 2 months. On-demand, full-body strength classes and JRNY® with Motion Tracking for improved exercise form now available.