Cisco upgrade from 256MB to 512MB

DDR2 - module - 256 MB - SO-DIMM 200-pin - 533 MHz / PC2-4200 - unbuffered - non-ECC - remanufactured - for Cisco 881, 886, 886 ADSL2/2+, 887, 887 ADSL2/2+, 887V VDSL2, 888