Get attention ''right now'' with this powerful 12-volt horn. The stainless steel diaphragm pumps out 124 dB (measured at 1 meter), which makes this our loudest electric horn. The non-corroding ABS case is triple chrome-plated for a shine that will last for years. Comes pre-wired for easy installation Vibration-dampening pad included Measures 4 1/4'' Long x 5'' Wide x 6 1/4'' H Draws 4 amps