Spin Control™ Model Rocket Launch Set offers loads of interactive fun never before used in model rocketry! It features a model rocket equipped with an electronic spin tracking nose cone and an adjustable fin that is set before each launch to spin the rocket as it blasts into space! The Nose Cone records the number of rotations you get during a rocket flight! Its simple, accurate and can track flights over and over again. Users can change the fin configuration and engine choice to alter the number of rotations flight after flight.This starter set comes with almost ready to fly rocket with assembled parachute, and complete launch system with motors. Minor assembly is required. Features: 12 inch Parachute Recovery Plastic molded Fins Maximum Altitude 630 feet Includes two rocket motors Specs: Length: 19 inches, Diameter: 1.35 inches, Weight: 3.2 ounces Recommended motors: B4-2 B6-2 B6-4 C6-3 C6-5 Technical: Requires four AA alkaline batteries (sold separately) Recommended for ages 10 and up with adult supervision for those under 12 Must be 14 to purchase in California or New Jersey