100% Waterproof Construction: Features silicone liner and heavy-duty latches providing perfectly airtight seal for your SOS GPS receiver satellite phones marine emergency device - includes CASEMATIX travel case only - Hard Shell Crushproof Protection: Impact-resistant hard shell ...100% Waterproof Construction: Features silicone liner and heavy-duty latches providing perfectly airtight seal for your SOS GPS receiver satellite phones marine emergency device - includes CASEMATIX travel case only - Hard Shell Crushproof Protection: Impact-resistant hard shell exterior protects your satellite messenger device and cables from drops and shocks that could damage your mini GPS tracker with customized foam interior - Shock-Absorbing Foam Design: Interior lined with solid polyethylene foam compartment perfectly designed to house GPS tool and charging cables - top lid lined with convoluted foam to reduce shock and prevent vibration - Compact Portable Travel Design: Ultra-compact 6" x 4.5" x 2" exterior dimensions easily stow in any backpack with discreet appearance - includes carabiner to clip to backpack for hands-free transport - Organized Accessory Storage: Custom cutout with convenient finger slot for quick GPS device removal plus small side slot to house USB charging cable or other accessories with perfectly secure fit