Kingston's 512MB Secure Digital (SD) card combines massive storage capacity, blazing data transfer rates and ironclad security in a memory card no bigger than a postage stamp. It features a read speed up to 5MB/sec and write speed up to 1.5MB/sec. It also features a built-in write protect switch to prevent accidental data loss. For added reliability and durability, this solid-state SD card is built of nonvolatile memory components and has no moving parts to wear out or break. With an excellent price-to-performance value, this SD card is an ideal expansion option for the smallest of SD compatible devices including many MP3 players, digital cameras, PDAs and smartphones.