What You Get: 1 x Inductive Tank 1 x Black Pen 4 x Button Cell 1 x Instruction Manual 1 x White Paper With Black Line 1 x Package Box Features: - Made by high quality plastic, its environmental friendly and safe for kids. - Has an optical sensor that reads the black line drawn on a white piece of paper. - Automatic inductive, it would run in circles until it finds the line. - It can promote children's thinking and imagination of development. - Tank model will appeal to children. - A wonderful gift for children, bring them fun and amazing. - Mini size, it is portable to carry anywhere. Specification: Material: ABS Pattern: Tank Color: Camouflage, Green, Yellow Power: 4 * LR44 Button Cell (Included) Size: Approx. 6.5x4.5x4cm Age Range: 3~14 Years Old How to Play: 1. Use an marker to draw a line on a white piece of paper. 2. Turn on switch on the button of the car. 3. Place car on top of the drawn line. 4. The car will run on the line automatically. 5. If the line is too thin, the car may stray off the line, please make the line thicker. (The line should be a quarter inch in thickness ) NOTICE: 1. Please allow 1-2 cm tolerance due to manual measurement. 2. Different displays show the same picture may be slightly differences. 3. The line: Not less than 4 mm, no overflow 10 mm, no acute-angled line.