Kingston KVR533D2U4/512 512MB DDR2-533 64x64 Micro-DIMM Notebook Memory
Specifications:

Mfr Part Number: KVR533D2U4/512
Type: DDR2 Micro-DIMM
Capacity: 512 MB
Speed: PC4200 533MHz
Size & Bit: 64M x 64
Pins: 214 pin
ECC: No
Registered: No
CL4, 1.8V
Warranty: Lifetime