2GB 204p PC3-8500 CL7 8c 256x8 DDR3-1066 1Rx8 1.5V SODIMM.

PLEASE MAKE SURE YOUR NOTEBOOK USES DDR3 BEFORE ORDERING.  THERE IS A 3.00 SHIPPING CHARGE FOR WRONG ORDERED ITEMS AND 15% RESTOCKING FEE.

Compatible with Acer Aspire One D255, D260 (DDR3), AOD255E-1802.
ACER ASPIRE D255E-13492
Aspire One Happy AOHAPPY-1101
Aspire One Happy AOHAPPY-1255
Aspire One Happy AOHAPPY-1515
Maximum Memory: 1 GB  with Windows 7 Starter
2 GB  with other operating systems
Expansion: 1 Socket(s)