Speed:<br />4GB/8GB-Class 4<br />16GB/32GB/64GB/-Class10<br />Memory card  2GB 4GB 8GB 16GB 32GB 64GB 128GB card + adapter <br />Specification:<br />1.memory Card + SD Adapter + retail package<br />2.plug and play (no software needed)<br />3.memory and TF Farmat<br />4.Capacity :  4GB 8GB 16GB 32GB 64GB <br />5.Great for cell phone ，cameras ，MP3/MP4 player Game and  More<br />6.Can be used as for Micro SD or SD Card<br />8.100% satisfaction Guaranteed !<br /><br /> Try to use USB3.0 to test ，Please not it !!! others ，64GB 128GB memory cards try to use win7 system or later ，sometime the other system  will not be test the cards successful !!!<br /><br />Package include :<br />1pc X Memory card<br />1pc X SD card adapter