Product Description FitMAX Spabells are designed to maximize all of water's properties as a jolt-free, invigorating, and dynamic exercise medium. Dozens of resistance, buoyancy and free-weight exercises for the entire body can be performed with this versatile equipment to burn fat, tone and build muscle, train for sports, and rehabilitate injuries. They are the perfect fitness accessory fo the FitMAX iPool! Amazon.com The perfect fitness accessory for your swimming pool, these handheld Spa Bells help you achieve your sport training and fitness goals while standing in as little as 3 or 4 feet of water. Each Spa Bell has three built-in levels of resistance: a basic funnel, small fins, and large fins. As you push, pull, twist, and turn the dumbbells in any direction underwater, the built-in resistance will help you work your biceps, triceps, shoulders, chest, and every other upper body muscle. The Spa Bells also come with a couple of extra accessories: Power Vanes, which easily click on to the basic dumbbell to add substantially more resistance (ideal for heavy-duty exercises), and Dome Caps, which trap water inside the dumbbells to turn the units into free weights (each weighing roughly 8 pounds). As an alternative, the accessories also serve other purposes. For example, you can use the Dome Caps to trap air inside, helping you perform leg exercises like deep-water running and scissor kicks. Or you can click two aquatic dumbbells together with the Power Vanes to create a single barbell. The Spa Bells are ideal for everyone from beginning exercisers to competitive athletes.