It is a WON'T drop hula hoop. Just adjusts the size according to your waist size until the hula hoop can't drop, and you can spin it all the time.
AUTO-SPINNING – With its centrifugal ball’s help, you can now do your daily hula hoop goals without exerting a ton of energy and time.
A FITNESS BUDDY – Helps you keep track of your fitness progress! It has a built-in smart counter that calculates & stores data (which is shown in an LCD screen) of your exercises.
EASY TO ASSEMBLE – To build this gear, simply lock the parts to each other along with the LCD screen. Then slide the centrifugal ball on the outer side, and fix the support pad on the inner side. No-fuss, no sweat!