support for uhs 1 ultrahigh speed bus interface extreme speeds of 40mbs reading and 10mbs writing iops reaches 500 reading and 150 writing surpassing the same class ten fold enough to satisfy the high speed access requirement of smart phones tablets and vehicle recorders team groups xtreem micro sdxc uhs 1 is a high performance memory card designed specifically for smart phones tablet computers and vehicle recorders it features speeds of 40mbs reading and 10mbs writing thanks