This is one used stick of Ramaxel desktop memory, DDR3L 4GB 1Rx8 PC3L-12800U-11-13-A1 1600MHz, model no.  RMR503KQ69F9F.  This low voltage (PC3L).  I pulled this from a Lenovo desktop computer.  Memory has been tested and works.  See pictures for more details.   

Important:  This is low voltage RAM (1.35volts).  Make sure you need DDR3L or PC3L, not DDR3 or PC3.  Contact me if you have any questions about compatibility.

Save the shipping and pick it up if you are in the Sacramento area.  Sorry, no international shipping.