... inside* USB interface + network interface etc.Enclosure* Material: Cold rolled plate, baked varnish surface* Color: Optional*Sound system: Internal ... waterproof metal enclosure, reaches IP65 standard.Working environmentWorking temperature -25 ~ +45°C; Storage temperature -30 ~ +60 °COSWindows(2000/XP/Vista ... , even in the low temperature to minus 25, it can work constantly with excellent performance.