I bought it from Taobao price around HK$380 including delivery charge.I have install it by myself very easy. The adaptor is just at the rear of light bulb.
This set has been used on my Honda Stepwgn for 9 months already and I toke it out and try on the Prius C. It run well but very bright.....mini版一体化氙气灯 江淮和悦远近光HID专车专用改装氙气大灯