144Pin 32bit DDR2 SODIMM * 1GB (1pc of 1GB) * PC2-3200 (400MHz) * Kyocera OEM P/N: MDDR2-1024 * Compatible with FS-2020DN, FS-3920DN, FS-4020DN, FS-C5100DN, FS-C5200DN, FS-C5300DN, FS-5350DN, FS-C5400DN, FS-6970DN