2pcs of 4GB Total. one 4GB PC3-10600S 204 pin SODIMM DDR3 1333MHz THIS MODULE IS MANUFACTURED BY Major Brand LIFETIME WARRANTY BY MANUFACTURED COMPATIBLE WITH: HP Omni 100-5116la, 100-5120a, 100-5120ru, 100-5130uk Two 200-pin DDR3 SO-DIMM sockets Supports DDR3 SO-DIMMs PC3-8500 (1066 MHz) PC3 10600 (1333 MHz) Non-ECC memory only, unbuffered Supports 1 GB, 2 GB, and 4 GB DIMMs Supports up to 4 GB on 32-bit* systems Supports up to 8 GB on 64-bit systems