* Fit HID Standard bulb - D2S
* Apply for all kinds of H4 series auto/motorcycle.
* Passing the test to work hi/low switching over million times.
* Passing the test to work 10 hours in temperature minus 40~105 Centrade degrees.
* It is safety for driver since the focal distance will not be changed when hi/low beam switching.
(Different from other hi/low H4 if they changed the focal distance)
* Patent Products
