DescriptionToys Type : Mice & Animal ToysType : catsIs Smart Device : NOMaterial : PlasticElectron Nanoworm Dimensions:Size: 45mm*15mm*15mm Color classification: red black, green black, green red, blue green, yellow red, purple green, pink green[Function]: It can roll over automatically and turn automatically at a 90-degree corner.Tips: Pushing the foot forward with the palm of the hand will make the bug walk in a straight line or turn a large circle. Changing the curvature of the bug's foot can make the bug change its walking direction.This product only needs one LR44 electronicsAnd the motor is full of power(The most important part of the motor) Only one button battery can drive the whole set of motors to run - drive the product to crawl~The product itself comes with a battery, open the package and playOne battery: LR44