Fireproof Box for MDVRModel: Hero-MD-FBMirror recording means that the SD card and hard disk recording at the same time with the same configuration (frame rate, image quality, and resolution). The Howen MDVR system can provide 2 different mirror recording function. One is internal mirror recording (the SD card slot is inside of the MDVR device), one is external mirror recording by fireproof box. This fireproof box is specially designed for anti-fire and anti-explosure to protect the video files in the last minutes for the accidents (for example: if the bus is on fire)Main FeaturesUSB interface realizes external mirror recording easily Rugged shell, effective protect the data security Professional developed, industrial-level SD Card insideSuper resistance to high temperature: able to protect the SD Card for 20 minutes in 500°C Waterproof, dustproof and explosive Proof Small size and easy installation SpecificationsSD card CapacityStandard Howen company SD card 32GB or 64GBSD Card speedCLASS 10Stand Fire PerformanceAble to protect the SD card for 20 minutes in 500 ℃Record ModeMirror Recording externalInterfaceUSB 2.0Material InternalNanometer MaterialMaterial ExternalSteelProtection LevelsIP65Wire Length300mmWeight2KGDimension146mm*124mm*88mmDimension（unit: mm）Model for selectionHero-MD-FB: MD series fireproof box, with 32 GB SD card inside