QUOTE form website:
The H4/9003 Bi-Xenon bulbs in the bi-xenon kit stay fixed and there is a shield that covers and uncovers the capsule of the xenon bulb as you switch from low to high beam, thus changing the beam pattern. The high beam gives an upward projection and the low beam gives a forward projection. You will maintain the same beam pattern with dramatic increase in intensity and distance.
XenonLink.com HID Conversion Kit.