4GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz For Toshiba Toshiba Satellite. Designed For Toshiba Toshiba Satellite: L855-126, L855-12G, L855-12N, L855-12R, L855-12V, L855-135, L855-136, L855-13M, L855-148, L855-149, L855-14C, L855-14J, L855-14K, L855-14Q, L855-14R, L855-14T, L855-14Z, L855-150, L855-151, L855-15L, L855-15U, L855-179, L855-17Q, L855-17R, L855-187, L855-188, L855-189, L855-B2M, L855D-00P, L855D-00W, L855D-100, L855D-S5114, L855D-S5117, L855D-S5139NR, L855D-S5220, L855D-S5242. Will also work with many other brands and models. Genuine A-Tech Brand: A-Tech is one of the most trusted names in Premium Memory. Backed by a Lifetime Warranty and 5 star customer support, A-Tech has you covered! Memory upgrades have never been easier. Designed specifically to help your computer run faster and smoother, an A-Tech memory upgrade is one of the fastest, most affordable, and easiest ways to improve system performance. A-Tech memory empowers your computer to achieve faster application loading times, faster system responsiveness, and increased ability to multitask and handle data-intensive programs. A-Tech modules are rigorously tested to ensure that your memory meets our stringent compatibility and performance standards. Every A-Tech ram module is tested for complete functionality before it leaves our doors and includes toll free technical support at 1-866-557-4527. Give your computer the best, trust A-Tech!