[High Speed]: Transfer speed up to 100MB/s. Twice faster than conventional SD cards. Compatible with PC, Camera, HD Camcorder and DSLR [4K Ultra HD]: Premium specifications of the A1 V10 Class 10, perfect for Full HD video and 4K Ultra HD (UHD) video recording. [Durability]: Waterproof, shockproof, temperature resistant, X-ray and magnetism resistant, able to withstand any environment. [Passed Test]: It has passed the durability tests such as quality control, speed test, repeated insertions and ejections. [Support]: Gigastone Limited 5 year warranty.