Designed for dash cams and home monitoring systems, the 128GB High Endurance UHS-I microSDXC Memory Card from SanDisk has an operational life of up to 10,000 hours of recording time. It can capture 4K and Full HD video, has a storage capacity of 128GB, is compatible with the UHS-I bus, and features a speed class rating of V30, which guarantees that write speeds will not drop below 30 MB/s. If your device does not support the V30 standard, this card also supports the U3 standard, which also guarantees minimum write speeds of 30 MB/s. Read speeds are supported up to 100 MB/s and write speeds max out at 40 MB/s.