The Sony 128GB M-Series is an ultra-tough Sd memory card for Dslr and 4K cameras with up to 277 Mb/s read speed and up to 150 Mb/s write speed. This set contains 2 x Sony 128GB Sf-m Series High-Speed Tough Sd Card, 5-Year Limited Warranty, and Koah Pro 2-in-1 Aluminum Shell Otg Dual Slot Sd Card Reader and Rugged Memory Storage Carrying Case.