Just got this but I can't use it because the software doesn't work on a Mac, so it's gotta go. This is the 1GB version of the EZ Flash II (Power Star version). Considered to be the Rolls Royce of GBA flash carts. Apparently, it's the only GBA flash cart on the market that has a special chip built in that makes the GBA battery last twice as long as other flash carts. Has a built-in clock too, so you'll be able to play games that need it like some of the Pokemon ones. Here's a description/pics of it:

http://www.ezfadvance.com/cards/EZ-F...Power_Star.htm

Comes complete with everything. Import sites sell it for $150. I'm asking $110 shipped. PM me if interested.