The sandisk extreme® microsdxc™ memory card lets you save time transferring media with read speeds of up to 170mb/s* powered by sandisk® quickflow™ technology⁹. Pair with the sandisk® professional pro-reader sd and microsd™ to achieve maximum speeds (sold separately). With write speeds up to 80mb/s* it’s ideal for your android™ smartphone, action cameras, or drones. This high-performance microsd™ card handles 4k uhd video recording, full hd video², and high-resolution photos. Features up to 170mb/s read; up to 80mb/s write** adaptor included capture stunning 4k uhd video² 64 gb memory shock-, temperature-, water-, and x-ray-proof