Car HID Xenon Conversion Kit--2 pcs H4 Xenon HID Telescopic Lights Bulbs Lamps 4300K H4 Telescopic Lamp adopts a Pulse Motor to move the lamp back forth; 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; Strong self-locking function and distinct change of high and low beams; Flex 200000 times without trouble; Miniature bulb base design make it to be appllied to all types of vehicles with hi/lo lamps; 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