Lexar Media 8GB Professional Series 40X CompactFlash Card WA Enabled (CCFB8GB-40-380) Write Acceleration Technology (WA) allows digital cameras and CompactFlash cards to work together perfectly to pass and store images more quickly and achieve image-write speeds never before possible. Speed rated at up to 40x (6 MB/s) Combination of camera and card firmware that reduces read/write protocol overhead for faster image storage Performs the just like standard 40x cards in non WA enabled cameras. Actual image storage time will vary depending on the camera model and the particular photo-shooting conditions This product is backed by a Lexar Media lifetime limited customer-satisfaction warranty