Features 1 Multiple uses can be inserted into mobile phones or other devices strong compatibility 2 Compatible with all types of devices equipped with memory cardcard slot 3 High quality flash particles fast Read and Write Speed 4 Multi capacity Multi selection 16GB 32GB 64GB 128GB variety of capacity for you to choose store high quality photos videos music and other data files multi platform fast sharing 5 Extreme light weight compact and durable for easier storage and use6 Simple as easy as plug and play Specifications Brand NUIFLASHModel Number NF TF 01Type TF Micro SD CardRead Write Speed Class10Size About 15 10 1mm 5 9 3 93 0 39inchCapacity 16GB 32GB 64GB 128GBSpeed Level C10 U1 U3Operation voltage 2 7V 3 6V About Speed 8GB 16GB 32GB Class 10 SDHC64GB 128GB Class 10 SDXCClass10 Read speed around 15 30MB S Write speed around 9 12MB SThe Micro SD card speed is based on internal testing performance may be lower depending on host device interface usage conditions and other factors Micro SD card speed is greatly affected by card reader adapter USB port etc Low quality device will 100 slow down card speed About Capacity middot 4GB approximately 3 6GB 3 8GBmiddot 8GB approximately 7 4GB 7 6GBmiddot 16GB approximately 14 4GB 14 8GBmiddot 32GB approximately 28 5GB 30GBmiddot 64GB approximately 58 5GB 60GBmiddot 128GB approximately 110GB 124GB Vendors are using Flash memory decimal arithmetic 1 MB 1000KB