This is the Kingston 256GB microSDXC Canvas Select Plus Gen3 memory card, rated for read speeds up to 150MB/s and A1 application performance, supplied with an SD adapter for use in any standard SD card slot as well as microSD-native devices like phones, tablets and action cameras. The Canvas Select Plus range is Kingston's mainstream everyday card line, positioned for general smartphone storage expansion, photo/video capture and file transfer rather than the higher-endurance or higher-write-speed use cases Kingston's Canvas Go Plus and Endurance lines target. The A1 rating guarantees a minimum level of random read/write performance, which is what actually matters for running apps or games directly from the card on an Android device rather than just storing media. At 256GB it gives a phone, tablet or camera substantial extra storage in a widely compatible, reasonably priced package, backed by Kingston's lifetime warranty.