The PB-2300E Hard Case is a watertight, high-performance hard resin case for video, audio, and photographic equipment transportation and protection. It is watertight and airtight with a pressure relief valve, easy to operate latches, and a comfortable hand grip. The patented resin material is lighter than many comparable brands, which helps reduce fatigue and shipping costs.The PB-2300E is constructed with a high-performance hard-resin material reinforced at the corners. The PB-2300E is ideal for GoPro or other action cams, audio, and photographic equipment. This case has an empty interior. See PB-2300F model for cubed foam interior Certifications -ATA (Air Transport Association) 300 rated -IP67 Military specification for protection against dust and against the effect of immersion between 15cm and 1.0 m -STANAG 4280 is a NATO specification for high and low temperatures for extended periods of time (up to 131 Fahrenheit for 48 hours and as low as -4.0 Fahrenheit for 16 hours) -DS 81-41 (military-grade)