"The item measures 10.00 inches in length and 5.50 inches in width, with a range of DC voltage from 5.0 VDC to 31.0 VDC. It is made of aluminum alloy (per QQ-A-200/250) with chromate corrosion coating and weighs not more than 4.0 pounds. The operating temperature ranges from minus 40.0 degrees Celsius to 71.0 degrees Celsius."