The HEXBUG Ring Rover's unique 2-ringed wheel design elements were carefully chosen by our engineers to get children to think about the science behind our robots. Available in an assortment of five colors. To power on, simply press the button on the top and take off with the I/R remote control. Turbo mode makes tricks, spins and stunts a blast. Want to race with a friend, pair up to four independently. Stunt ramps, remove, Ring Rover and batteries included. Ring Rover unit uses rechargeable lithium polymer battery. Charger cable included for USB. USB charger not included.