Retro Pocket Rocket Yellow with engines powerful enough to make the Space Shuttle Shake, quiver and quake, Retro Pocket Rockets vibrator will take you to the moon and back for more! When your mission is complete, cool your engines by touching down on your nearby lunar base display included. Specifications Speeds: 1. Item Dimensions: 5.15 inches long by 1 inch wide. Battery requirements: 1 AA Alkaline. Battery not included. Contains no: Latex, Natural Rubbers, Phthalates or Toxic Heavy Metals like Cadmium and Lead. International Safety & Environmental Compliance: CE, ROHS, WEEE and ASTM.