I just looooove common names, don't you?
Okay, it could be one of 2 species, several subspecies.
Egyptian Sand Geckos (or just plain Sand Geckos) are usually Stenodactylus.
The trouble is the 'micro' part... it's normally reserved for Tropiocolotes, truly a micro gecko. I've had both species, several kinds and find they're all very interesting and easy to breed. Check out the pictures for both at
GGA Photo Gallery the link goes to teh Q-U names, makes it easier to find the ones you want. There's a care sheet for Stenodactylus sthenodactylus (note spellings) but it can also serve as a basic good all around care sheet for Tropiocolotes. The differences in their care isn't much, mostly food size differences.