3 pin electro-mechanical 12 volt flasher will last up to 10 times longer than thermal flashers.  Able to handle variable loads - can flash up to 10 signaling lamps and 2 indicator lamps.  Flash rate will not slow down when towing a trailer.  Meets FMSVSS108-S.A.E. J590b J945.  Precious metal contacts.  Unique audible click.  Input lead must be fused at 25 amps.