Driver Identification

This light was bought off Ebay but I have no idea what it’s capabilities are. Can anyone enlighten me on what I might expect as I break it open for it’s first of many inspections? Driver, capabilities, alternative setups using this as a host?

2x18650 XM-L

This is the first flashlight that I see someone actually pasted a Ultrafire logo onto a flashlight from another photo.

LOL

My question is "Where can I get that 501b-compatible pocket clip?"

Here are the original images: http://www.ebay.com/itm/141048624725
One of the pictures it is labeled as a “CREE”.