Brand – Twinmos, Model – Twinmos 64GB, Type – Micro SD, Storage Capacity – 64GB, Access Time Read (Mbps) – 40Mbps, Access Time Write (Mbps) – 10Mbps, Speed Class – Class 10, UHS Speed Class – UHS-I, Operating Voltage – 3.3V, Others – Feature: (IOPS reaches 500 reading and 150 writing, surpassing the same class 10 fold. Support CPRM, Compatible with SD slots by the adapter, Single/Dual Channel with high performance, Support SDHC Host specification, Enough to satisfy the high-speed access requirement of smartphones, tablets, and vehicle recorders), Specialty – IOPS reaches 500 reading and 1TwinMOSs 64GB microSDXC Class 10 UHS-1 is a high-performance memory card designed specifically for smart phones, tablet computers, and vehicle recorders. It features speeds of 40MB/s reading and 10MB/s writing. Thanks to the improved IO access capability, IOPS is able to reach 500 MB/s reading and 150 MB/s writing, exceeding substantially the limits of the same class, enough to satisfy the requirement of smart phones to frequently access small files., Warranty – Product Lifetime