Hoverboard. An amazing invention of the 21st century. It has become a very popular item to buy. The device can reach a maximum speed of 12 miles per hour and comes with built-in LED lights, Bluetooth speakers, and a built-in camera. The device is also very light-weight, easy to maneuver, and fun to use. It is made up of a lithium-ion battery that can last up to 15 minutes on a full charge. The device can be used for exercise and for traveling.