Kingston 16GB Secure Digital High Capacity (SDHC) Card is SDHC Class 4, meaning that it supports 4 MB/sec minimum data transfer rate. While it is not the fastest SDHC card (Class6 supports 6MB/sec minimum data transfer rate), it offers big storage capacity for very reasonable price. While SDHC cards have the same physical size as old SD cards, make sure that it is compatible with your device. Look for the SDHC logo on the card and host device (camera, camcorder, PC, etc.).