This wacky li'l UFO is controlled by sound! Navigated by a sound-sensitive remote control system, you can have hours of fun with this little guy. Measures 4.5in tall and 4.5in diameter, and weighs .5 lbs. The body is colored pearl white and deep blue. Simple assembly is required. No remote control needed! After building and customizing the UFO robot, race it around the room and control it using sound made from the box. The Alien inside pops in and out as he stops and starts at your command! 3-AA batteries required.