... >> Table 3. Dimensions, Weight, Acoustic, MTBF, and Environmental Range Dimensions (H x W x D)InchesCentimetersmeTough ... Between Failure (MTBF) HoursmeTough LE10,000Environmental RangesWith AC Power SupplyOperating Environment and AltitudeNormal Operating Temperature and Altitudes:-5ºC to +45ºC ... , up to 5,000 feet (1500 m)-5ºC to +40ºC ...