(1)  2 Terminal 12V LED Electrical Flasher New 2-prong (2 terminal with ground wire) 12 Volt LED Flasher. Flasher is designed to replace stock turn signal flasher on most 1955 to present cars and trucks with 2 prong 12v systems. Flasher has NEGATIVE ground (flasher will NOT work with early 6v POSITIVE ground cars/truck or motorcycles). Replacement of the stock flasher is usually needed in order for the LED turn signals to operate as intended. Solves: hyper flashing, burnt out bulb indication, or non flashing when using led lights and led light bulbs. We are also including a FREE "reverse polarity" adapter. If your turn signal flasher dock has the wires reversed, no need to disconnect, switch, and reinstall wires. Simply attach the adapter to the end of the flasher. These flashers will also work with stock turn signals, so if you change back to stock lights, there will be no need to swap out the flasher We also offer 3-prong LED flashers for most pre-1955 vehicles that have been converted to 12v Solve Turn Signal Problems: Hyper Flashing, No Flashing, or Burnt Out Bulb Indication when using LED Lights and LED Bulbs 2 Terminal Flasher / 2 Prong with Ground Wire Use with LED lights Max 20 Amps