4GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz For Toshiba Toshiba Satellite. Designed For Toshiba Toshiba Satellite: L855-S5112, L855-S5121, L855-S5136, L855-S5136NR, L855-S5309, L855-S5366, L855-S5368, L855-S5371, L855-S5375, L855-S5381, L855-S5383, L855-S5385, L855-SP5165FM, L855-SP5168KM, L855-SP5260CM, L855-SP5260KM, L855-SP5260LM, L855-SP5260RM, L855-SP5260WM, L855-SP5263KM, L855-SP5268WM, L870-01D, L870-11J, L870-120, L870-12L, L870-12N, L870-132, L870-136, L870-13W, L870-141, L870-147. 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!