... .Dual SD cards slots, max 32GB each Digital video recorder h.264 dvr with 2 SD card supported ... / 4 HD1 / 4CIF), GPS module optional2. H.264 video compression, Linux operation systems, dual streaming3. Digital timestamp, motion ... , brakes, backing up, turns and alarms8. SD lock, industrial grade design for vehicle use Specification: SystemLanguageChinese/EnglishOperating systemLinuxVideoVideo input4 ...