Part No: 621569-001 - HP 4GB (1x4GB) 1333Mhz PC3-10600 Cl9 Unbuffered DDR3 SDRAM Dimm Memory for Laptop Pc

Capacity: 4GB (1 stick of 4GB)
Speed: 1333MHz
Type: DDR3 SDRAM
Form Factor: DIMM (Dual Inline Memory Module)
Memory Standard: PC3-10600
CAS Latency: CL9
Rank: Likely single rank, as it is unbuffered
ECC (Error-Correcting Code): Non-ECC (does not include error correction)
Buffering: Unbuffered (designed for consumer or non-server systems)
Compatibility: Designed for laptops and other devices with DIMM slots (typically in desktops as well)