temperature-proof, X-ray proof, shock-proof and magnet proof⁴
SDHC it’s Capacity form 4GB - 32GB
SDXC it’s Capacity from 64GB - 2TB
SD stands for "Secure Digital", SDHC stands for "Secure Digital High Capacity", SHXC stands for "Secure Digital eXtended Capacity". From the names only you can tell he main difference in all three i.e. storage capacity. SDHC cards offers between 4GB to 32GB and SDXC offers more than 32GB.
What in box:
1 X 100% Original Capacity sandick 80Mb/s Memory Card With Ori Seal Pack