Smartphones, tablets, ebook readers and other devices have a limited amount of built-in storage. Transcend's Class 4 microSDHC cards are a cost-effective way to expand your device's memory capacity and store more movies, music and data. From the Manufacturer Today’s advanced digital cameras, smart phones and tablets are fast and powerful, with memory-hungry apps that perform best with high-speed, high-capacity storage media. Offering vast storage space, Transcend’s Class 4 microSDHC cards are a cost-effective way to expand the memory capacity of your device to store many times more movies, music, eBooks and app data. What’s more, the microSDHC Class 4 rating guarantees read/write speeds of at least 4MB/s to keep pace with your mobile lifestyle. Transcend Class 4 microSDHC Cards Class 4 guarantees a write speed of 4MB/s or higher – perfect for smart phone apps and mp3 music playback Ultra small, fast and spacious Measuring just 0.4 x 0.6 x 0.04 inches, Transcend’s Class 4 microSDHC memory cards are only one tenth the size of an SDHC card. Despite its tiny dimensions, Transcend’s Class 4 microSDHC cards offer guaranteed write speeds of 4MB/s or higher, allowing you to enjoy skip-free media playback and entertaining apps. What’s more Transcend’s Class 4 microSDHC cards provide vast storage space up to 32GB, enough to store all your movies, music, eBooks, ringtones and app data.