Brand new 512MB PC-2700 200pin SO-DIMM internal memory module specifically tested and rated for the Apple computer systems shown in the table below. This unit is backwardly compatible with PC-2100 memory.
All new memory comes with a Lifetime warranty and is usually Transcend memory. Contact us to confirm this if you are concerned about the brand.

Compatibility table
12" Aluminium PowerBook G4	All models
15" Aluminium PowerBook G4	All models except DDR2 version of 1.67GHz model (M9969LL/A) *
17" Aluminium PowerBook G4	All models except DDR2 version of 1.67GHz model (M9970LL/A) *
iBook G4, 12" & 14"	All models
15" iMac G4 (TFT screen)	1GHz model only
17" iMac G4 (TFT screen)	1.25GHz model only
20" iMac G4 (TFT screen)	1.25GHz model only

* Apple produced two variants of the 15" and 17" 1.67GHz PowerBooks; one using the DDR1 memory used by the rest of this range, and a later model using DDR2 memory. This memory will NOT work in the DDR2 models."