Harmony PDA Dry Flex Case Device remains fully functional from within the case. Urethane coated nylon fabric welded to clear urethane internal panels provide light, compact, and reliable protection Dual-density foam protects your device from impact and floats in water Molded clip allows attachment to boat or PFD Will fit devices up to 6  x 3  x  (17cm x 6 cm x 2 cm)