1) Both positive and negative poles are available 2) Equipped with ceramic sockets and corrugation bushing 3) This products also can be equipped with all kinds of headlight assembly sockets and lamp holders 4) Needless to change original light wire system and bulbs 5) Good light gathering and piercing power, enhance the brightness, has the effects of HID 6) Has the protection of soft startup and can prevent your bulbs form broken when the voltage suddenly changes 7) Has the function of protecting the situations of low voltage, over-heat and short circuits 8) 12V two bulbs and 12V four bulbs