Features:CompactFlash memory card is designed to help advanced amateur and professional photographers get the best performance from their high-end cameras.One of the world's most popular digital mass-storage devices,CompactFlashÂ:emoji: memory cards from KingstonÂ:emoji: bridge the gap between hungry storage requirements and affordability.CompactFlash memory cards offer greater storage than many other mediacards, at a fraction of the cost. They're available in a variety of capacities, so users are sure to find the right size to fit their needs.Specifications:Capacities:8GBDimensions:1.43" 1.68" x 0.13" (36.4mm x 42.8mm x 3.3mm) - CF Type 1 Speed Rating：2GB 50X: 10MB/sec.read rate, 8MB/sec write rate 4GB, 8GB: 45X 8MB/sec.read rate, 6.75MB/sec write rateOperating Temperature：0 to 60 ℃ / 32 to 140 ℉Storage Temperature：-20 to 85 ℃ / -4 to 185 ℉Voltage：3.3V/5VStandardized complies with CompactFlash Association specification standardsSmall one-third the size of a full-size PC cardEasy plug-and-play Guaranteed 5 years warrantyVersatile compatible with PC Card Type II adaptersEconomical autosleep mode preserves system battery life* Please note: Some of the listed capacity is used for formatting and other functions and thus is not available for data storage. Some devices may not support all of the options listed. Consult your owner's manual for supported configurations.**CompactFlash Elite Pro 4GB and 8GB cards work in newer cameras and other devices that are capable of utilizing a FAT32 file system.***Speed may vary due to host and device configuration.