This device can be installed in docks and places where the sea shore has concrete walls. This device has a hollow polyurethane tank that floats on the water and is connected to the pneumatic cylinder by a lever. The hollow tank is moved by waves. It goes up and down and the force of buoyancy causes the air to be compressed by the pneumatic cylinders. The compressed air stimulates the pneumatic motor and the generator connected to the pneumatic motor produces electricity.