The best results at high speed: ultra-fast data transfer. Ultra-long lifetime. Up to 100,000 write/read cycles. Low energy consumption. Integrated error correction technology (ECC). Mechanical write-protection switch. Compatible with all common digital cameras, navigation systems, hand-held pcs, PDAs, and other devices that are SDHC compatible. Card format: 24 mm (w) x 32 mm (h) x 2.1 mm (t). Suitable for devices with a secure digital hc memory card slot. Meets secure digital 2.0 specifications. Available in 4gb, 8gb and16gb. The data transfer rate is based on the class (2/4/6) of the card. Please check your device instruction manual for compatibility with SDHC cards.