This is the adjustable kettlebell that lets you instantly select one of six different weight amounts with the touch of a button. Unlike multi-piece kettlebell sets that take up extensive floor space, the JAXJOX Kettlebell Connect  has a single ergonomic handle and lets you select weights from 12 lbs. to 42 lbs. using a series of stacked plates. The kettlebell also connects to a smartphone via Bluetooth and a free iOS/Android app lets you track reps, sets, time, and weight used for up to nine profiles. A full charge using the included USB adapter provides up to 14 days of power. 14 1/2" H. (42 lbs.)