Patriot LX Series 4GB High Speed MicroSDHC - Class 10 UHS-1 - Up to 48MB/sec Transfer Speeds - PSF4GMCSDHC10 Up to 48MB/s read, up to 20MB/s write in UHS-I mode Class 10, UHS-1 performance allows fast and smooth continuous shooting, multiple frames per second and full HD video capture Fast performance minimizes photo and video transfer times to your computer Compatible with devices that use SDHC and SDXC storage Durable & ultra-reliable: magnet proof, shock proof, temperature proof, and waterproof