20 Pack - SanDisk 8GB Class 4 SDHC Memory Card, Frustration-Free Packaging- SDSDB-008G-AFFP Cards include security feature for protection of copyrighted data SD cards are fully compatible with all SD-compliant devices Speed performance rating: Class 4 (based on SD 2.0 Specification) Writeable label for easy identification and organization Ships in Certified Frustration-Free Packaging