This RAM module is a Micron MT8KTF51264HZ-1G6P1, and here are its key Specifications
Capacity: 4GB
Type: DDR3L SDRAM, SODIMM (Small Outline Dual In-line Memory Module)
Speed: 1600 MT/s (PC3L-12800S)
Voltage: 1.35V (Low Voltage)
CAS Latency: CL11
Rank: 1Rx8 (Single Rank)
Pins: 204-pin SO-DIMM
Error Correction: Non-ECC (No Error Correction Code)
I have been using these for the last 2 years on a thin client, worked flawlessly, 24 hours testing warranty
No invoice , purchase date not accurate but roughly 2 yrs