DVR 1.USB2.0, USB mouse USB backup,USB-RW ,USB upgrade cooperation stable ... stream, advanced and filtering techniques make streaming save 28% HDDUSB2.0, USB mouse ,USB backup,USB-RW ,USB upgrade cooperation ... ,web,USB backup simultaneouslyInterfaceGUI16 bits full color GUI,Support MouseDiplay1/4 chLanguageEnglish, Simplified Chinese, Traditional Chinese, Italian, Spanish, Japanese, Russian, ...