From Manufacturer
Get the most out of your mobile phone, smartphone, tablet, and other devices with the 64GB EVO UHS-I microSDXC Memory Card with SD Adapter from Samsung. This card features a storage capacity of 64GB and is able to achieve read speeds of up to 100 MB/s, as well as write speeds that max out at 20 MB/s and won't drop below 10 MB/s, thanks to its UHS-I and U1 class ratings. The speeds will allow you to record Ultra HD 4K and Full HD video, as well as raw and JPEG photos.
Samsung also built this EVO card to be extremely durable, as it can last for up to 72 hours in seawater with its IPX7 rating, temperature extremes ranging from -13 to 185°F, airport x-ray machines up to 100mGy, and magnetic fields up to 15,000 gauss, which is equivalent to an MRI scanner. So that this card may be used in SD-compatible devices, a microSD to SD adapter is included.
