Functions:

Bi-xenon bulb with two in one ballast kit.

Say goodbye to the Bi-xenon kit with four pcs ballasts! Now you could get the Bi-xenon with two pcs ballast, because this ballast is 2 in 1 function.

And the bi-xenon bulb is not as before. We use chinaware made of  bulb socket, this material could bear very high temperature from burning bulb.  Have higher quality and durable than previously bi-xenon bulb.

Price is not higher than Bi-xenon bulb kit with four ballast!