The GIGASTONE 256 GB Micro SD Card with Adapter is a high-quality memory card suitable for various devices. With a fast read speed of 100 MB/s and a write speed of 40 seconds, this Class 10 card offers quick and efficient data transfer. Its waterproof feature ensures durability even in challenging conditions. Manufactured in Taiwan, this universal card is a reliable choice for storing large amounts of data on your cell phone or other devices.