Dual Speed Alternating Headlight Flasher - Model 03.W129 - Choose 80 or 220 FPM per side during installation. 100% solid-state. Night-time Cut Off deactivates the flasher when low beam lights are on. Horn Feature allows high beam headlights to flash when horn is tapped and all lights are off. High Beam Override works with the vehicle's high/low beam switch to prevent high beams from flashing. Custom flash rates available. Waterproof. Made in the U.S.A.