The Patriot Signature Series Class 4 MicroSDHC flash memory cards offer improved performance and larger storage capacity than earlier MicroSD cards. Additionally, these cards meet the latest SD Association specifications providing best in class compatibility with a wide variety of host devices. With the included MicroSDHC to full-size SD adapter, the Patriot Signature Series Class 4 MicroSDHC card is flexible and versatile for use across multiple devices. Whether for use with mobile phones or digital cameras, the Patriot Signature Series Class 4 MicroSDHC cards offer the reliability, compatibility and the flexibility you are looking for. Available in 4GB, 8GB, 16GB and 32GB capacities, these cards offer a 5 year warranty.