The 26.6L Digital Waterproof Fire Resistant Safe with Ready-Seal is UL classified for 1 hour to withstand an external temperature of 927°C while maintaining an internal temperature of less than 177° C. The safe has been tested by an independent testing lab and verified to protect electronic media including memory sticks; CD’s; DVD’s and external hard drives. In addition; the safe will protect documents; electronics; and other valuables. The safe's concealed hinges are designed to resist prying and is waterproof even when fully submerged. Interior Dimensions: 327 H x 264 W x 311 D (mm)Exterior Dimensions: 419 H x 368 W x 483 D (mm) | First Alert 26.6L Digital Waterproof Fire Resistant Safe