"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 AL alloy per QQ-A-200/250 and features chromate corrosion coating. The weight must not exceed 4.0 pounds, and it operates within a temperature range of minus 40.0 degrees Celsius to 71.0 degrees Celsius."