Vibrational motion caused by a moving vehicle is transduced into electrical energy by a vibrational-to-electric energy converter, and stored in an electrical energy storage device such as a rechargeable battery. The tactile feedback unit has a gel layer for deforming discrete surface areas of a touch-screen display; and a tactile feedback controller for controlling the deformation by the gel layer. Therefore, no outer wrapping for the anti-fomitic device is required. When the shredder is in its auto mode, the passage width defined by the gap between the rods is exactly the maximum thickness of paper that can be feded each time. Application to video data compression. The distal end of the inner portion is located within the outer portion and bears against the first end of the grommet to put pressure on the spark plug contact button.