Memtes Friction Powered Dump Truck Toy with Lights and Sound for Kids Press the button on the driver side to turn on the lights and sound Friction powered mechanism installed, just push or pull the dump truck and it will go Put stuff in the back of the truck, Lift the back of the truck to empty it Push the yellow button on the side of the truck for the back to lift up Dump truck size 10 "(length) x 3 "(height) x 4 "(width) Included and installed with batteries