ESTES Electronic Beam Model Rocket Launch Controller for Ignition of Estes Rockets 002220 Get ready to launch your new rocket with the reliable Electron Beam Launch Controller. Launch controller comes complete with safety key and 15 ft. of cable. Requires four new 'AA' alkaline batteries - not included. Technical Specifications Estes model rocketry is recommended for ages 10 and up with adult supervision for those under 12. Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a launch system, model rocket engines, igniters and recovery wadding are required - sold separately-unless otherwise specified