Kingston Digital 256GB SDXC UHS-I Speed Class 3 90MB/s Read 80MB/s Write Flash Memory Card (SDA3/256GB) Versatile - Class 10 performance when used in a non-UHS-I capable device Compliant - with the SD Card Association specification Secure - built-in write-protect switch prevents accidental data loss Compatible - with SDHC & SDXC host devices; SDXC cards are not compatible with SDHC-enabled devices/readers Durable - For your peace of mind, the card has been extensively tested and proven to be waterproof, temperature proof, shock and vibration proof and X-ray proof Guaranteed - lifetime warranty, and free technical support