200 pcs SONY Ultra Micro SD Card 1024GB SONY Ultra Micro SD Card SD/TF Flash Memory Card 1024GB Micro For MicroSD For Phone Class10: Read speed around 15-30MB/S ,Write speed around 9-12MB/S The Mini SD card speed is based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. Sd memory card class 10 high speed for Mobile Phone,Tablet,Notebook,Tachograph,Camera Mini SD card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed.
