Combines 15 sets of dumbbells into 1Each dumbbell adjusts from 5 to 52.5 poundsEasy-dial system allows for quickly changing exercisesMeasurements: 16L x 8W x 9H in.Manufacturer's warranty included (see product guarantee). The Bowflex SelectTech 552 Adjustable Dumbbell Set - 5-52 lbs. allow you to adjust the weight you wish to lift without taking up a bunch of space. These time- and space-efficient dumbbells are contructed from steel and come with a 3-year manufacturer's warranty.Additional Specifications: Adjusts in 2.5-pound increments up to 25 pounds; 5-pound increments from 25 - 52.5 pounds Maximizes efficiency and variability in workout - in a compact space Manufacturer's warranty included: see complete details in the Guarantee & Returns area Dumbbells only - stands not included About the Bowflex SelectTech Trainer App Achieve the most out of your workouts and track your progress as you go with the Bowflex SelectTech Trainer App. This app allows you to tailor your workouts to get the results you've always wanted and improve you overall strength and flexibility. The Bowflex SelectTech Trainer App features several free custom-designed workouts, tracking and accountability of your progress, and trainer tips to help you perfect your technique.