It has 2.2 kg Cast Iron flywheel. Not like other with 1kg plastic wheel. It can be used on a table for arm exercises or on the floor to work your legs. If you are looking to exercise your leg, make sure you don't sit on it, instead place your feet on the floor so it is also known as under desk bike ✅Portable Exercise Tool: Mini exercise pedal bike has a small and lightweight design that allows you to take it on excursions, and effortlessly transfer it from room to space or out.