Hello, I'm Jewel with Kingston Technical Support and would like to offer our assistance. The recommended part number for the HP 250 G2 Notebook is KTH-X3CL/4G (http://www.kingston.com/us/memory/search/?partid=kth-x3cl/4g). The difference from the part listed is that it is low voltage which is required by your system. For any further assistance, please call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and I or another available Technician will assist you.
Thank you for selecting Kingston as your upgrade partner.