Features: 1. Waterproof, compressive and drop detection. 2. Internal fixation with elastic can protect hard disk from collision. 3. GM place digital accessories,like hard disk drive,cellphone battery,etc. 4. Storage with thoughtful design,easy to store earphone,digital lines,Sat Nav,GPS ,etc 5. Suitable for tomtom series GPS,4’’~7’’GPS,hard case,digital cameras,etc.