Capacity: 12 Micro SD cards slots，suitable for security digital card protection and storage of digital camera, PDA, multimedia player, mobile phone, computer and other portable devices | Lightweight: The outer casing is made of ultra-thin aluminum gold box, waterproof and sealed, shockproof and hard protection, light and compact, just like a business card holder box which is saving space extremely, easy to carry，so that can be placed in the wallet and pocket as well as put into the camera bag. | Design: Button-locking at the opening for quick and easy opening and closing. The interior is made of soft EVA foam, which is non-fading, moisture-proof and anti-magnetic. Each slot is carefully crafted to the size of the corresponding SD card to ensure that the card is securely stored in the slot, not loose and easy to remove. | Protective: The internal card slot is protected by foam lining to protect the card from shock and vibration. The waterproof aluminum sealed outer packaging prevents debris, sand and water from entering the cartridge for that protects the SD card from damage. | Wide Range of Applications: Compact card reader storage for all standard Micro SD/Micro SDXC/Micro SDHC cards, providing a portable alternative to PC/laptops , listening to music and view image,from that converting data from a flash drive.