Salt Water Fuel Cell Engine Car Kit Features --Powered by salt water, works without batteries --Two modes: V-engine and flat engine. Twist the body to handle different types of terrain --Transparent case allows to see engine work --Switch positive and negative connectors to make the car run forward and backward Specifications --Age recommended: 14+ --Power type: salt water --Material: ABS - PC - EVA --Number of modes: 2 --Color: white + blue --Number of batteries: 0 --Number of pieces: 96 --Number of wheels: 4 --Application: educational - engineering - robotics --Level: Beginner --Size: 120 mm L x 99 mm W x 89.3 mm H --Weight: 266 g