Car HID Xenon Telescopic Light Conversion Kit--2 pcs H4 Xenon HID Bulbs Lamps Lights 4300K Flex 200000 times without trouble; Miniature bulb base design make it to be appllied to all types of vehicles with hi/lo lamps; Strong self-locking function and distinct change of high and low beams; Relay harness adopts sepatate citcuit for each lamp,making sure that both lamps do not go off at the same time in the case of failure. 6.0CM set flexibility with Miniature bulb base contributes to excellent standard beam pattern, low beam have distinguish cutoff-line and high beam have no light diffusion; H4 Telescopic Lamp adopts a Pulse Motor to move the lamp back forth;