Wig Wag Headlight/Grille Light Flasher 2 or 4 headlight system on any vehicle with a 12 VDC negative ground system / Constant flash rate of 1.9 f.p.s. / External mounting flanges. Not compatible with Dodge Dakota or Durango 1999 or newer Power: 12V DC / Modulates high beams at 3.6 f.p.s. / Compact molded polycarbonate housing Dimensions: 3"W X 1 7/8"D X 1 1/4"H 3 year manufacturers defect warranty