The HiSpec 2 features a built-in battery, expandable memory from a standard 4GB up to 8GB and can be configured to withstand 100 Hi-G accelerations for 20 ms and vibration to 10g's. Its built-in battery ensures fail-safe operation in the event of a power loss and allows untethered operation for up to an hour. There is also an image retention mode that stores images up to 24 hours. The choice of Hi-G format, IRIG B timing and increased memory combined with its small size make the HiSpec 2 ideal for on-board automotive impact testing, military ordinance testing and other harsh environments. With its ISO rating of 2500 monochrome, the HiSpec 2 records images in superb detail up to 506 fps at 1280 x 1024 pixel resolution and up to 112,000 fps at reduced resolutions.