TOUGH specification with crush and shock-proof design. Rib-less and write-protect switch-less design enhances reliability, eliminating the risk of breakage. IP68 dust and water proofing. Enjoy the fast speed of up to 277 MB/s read, and up to 150 MB/s write. SD Scan Utility monitors the condition of your card and lets you know before it has reached its write cycle limit SF-M128T/T1