Sunelec 8GB Micro SD (TF) Card Secure Digital Class 10 Micro SDHC Flash Memory Card With Adapter Pack Of 1 Transfer rate: CLASS 10, Writing speed: 10MByte/s, Reading speed: 20MByte/s,convenient and reliable. Water proof, Temperature Proof, X-Ray proof, Shock proof Transfer rate: CLASS 10, Writing speed: 10MByte / S, Reading speed: 20MByte / S Water proof, Temperature Proof, X-Ray proof, Magnetic proof Use in high-end compatible digital devices including Cameras, MP3s, Smartphones and Tablet PCs.