1GB DDR2 PC4200 Memory Upgrade 4 Toshiba Satellite A135-S4499, A135-S4507 Notebook, A135-S4517, A135-S4527, A135-S4637, A135-S4827, A135-S7404, A135-SP4016, A135-SP4048, A135-SP4058, A135-SP4088, A135-SP4796 Technology: DDR2 SDRAM DENSITY: 1GB PIN COUNT: 200-pin Speed: PC2-4200 533MHz CL: CL=4