Transcend microsdhc class 10 card is only about a tenth as big as a standard sd card with small dimensions and high speed it corresponds to the new class 10 specification and offers minimum transfer rates of 10 mbs with devices that support sd 30 the microsdhc class 10 card is a perfect combination of compact design high speed and large storage space of 4gball microsdhc cards have passed the compatibility and reliability tests and have a warranty of 30 years each card has an integrated ec