Class 10 enabled for advanced transfer speeds up to 24MB/s-163X.Optimized for digital SLR photography, HD video, high-res. files & data transfer. Extreme temperature rated: -13A°F to 158A°F (-25A°Cto 70A°C).Delkin's Secure Digital PRO Cards are designed to be fast and durable for extensive shooting in the most extreme conditions. Optimized for use in professional grade digital compact cameras, SLRs and camcorders. SDHC Pro Class memory cards are capable of transfer speeds up to 24MB/s and available in capacities from 4GB to 32GB. SDHC Class 10 is enabled for advanced transfer speeds up to 24MB/s-163X. Optimized for digital SLR photography, HD video, high-res. files & data transfer. Every Delkin memory card comes with an industry leading lifetime warranty and US based customer support.