By M.Y. Products/Rockboard Scooter. Now you can cruise longer without the need for batteries or gasoline. Powered by you, the Rockboard RBX uses patented propulsion technology to turn the easy rocking motion of the foot deck into super speed, up to 10 MPH. The Rockboard RBX is built strong so it can handle up to 220 lbs. Safety features include the aluminum-alloy brake handle, rear-mounted brakes and solid handlebar assembly. Parents can adjust the handlebars to the rider’s height using the telescopic downpipe and height adjustment lock. 220 lbs. capacity. Ages 8 and up.