1.Capacity: 16GB,64G,128G,256GB 2.Format: FAT32 32G / EX-FAT 64G 128G 256GB 3.Speed Class: Class 10 U1 32G Class 10 U3 64G 128G 256G 4.Read Speed: Max 95MB/s 32gb Max 100MB/s for 64GB 128GB 256GB 5.Write Speed: Max 20MB/s 32B Max 60 MB/s 64G Max 90MB/s 128G 256G Support 4K 32G: No 64G,128G,256G: Yes 6.Apply To: Camera/PSP/Tablet/Smart Phone/Car DVR/Car GPS /Medical Device/MP4 ... 7.OperatingVoltage: 2.7V ~ 3.6V Storage Temp: 40º F to 185º F -40º C to 85º C Operative Temp: 13º F to 185º F -25º C to 85 º C