GP THUNDER GP-CF13 features LED adjustable flash speed, a piece of 3-pin Electronic LED 12V Flasher Relay Fix for Turn Signal and Blinker Light. This will solve LED related turn signal problems such as rapid flashing, not flashing, or bulb burnt out warning on dashboard. Better all, dial to the desired flash speed whenever you need to. These are designed for most 3-pin Japanese configurations. Simple Plug N' Play.