Thank you for viewing. This is a Lexar CFexpress card Type B 512GB GOLD LCXEXPR512G-RNENJ. I am selling it because I haven't used it much. If you don't need a large data capacity but prioritize write speed, please consider purchasing it. Features: ・Compatible with a wide range of devices, including digital SLR cameras, mirrorless cameras, and cinema cameras. ・Optimal for shooting high-bitrate videos (such as 8K RAW) and high-resolution continuous shooting due to its high-speed write performance of up to 1500MB/s. ・Ideal for post-shooting workflow tasks such as backup and editing with a maximum read speed of 1750MB/s. ・Robust design that withstands harsh usage environments. ●Transfer Speed*1: Max Read Speed 1750MB/s *1, Max Write Speed 1500MB/s *1 *1 Write speed is based on Lexar's measurement results. Speed may vary depending on your environment. ●Operating Temperature: -10℃ to 70℃ ●Storage Temperature: -10℃ to 85℃ ●Weight: 7.8g ●Dimensions: 38.5 x 29.6 x 3.8mm I have used it with care, so there are no visible scratches or stains, and it works without any problems.