Specifications: 1) Extreme Low E.S.R.: less than 0.002 ohm 2) Auto on/off four-digit display 3) LED indicator lights 4) Electronic polarity protection circuit 5) Over-voltage protection circuit 6) Normal working temperature: minus 40 degrees to 95 degrees 7) Mounting brackets & hardware included Optional digit color Red,Blue & White AVAILABLE IN: 0.5F,1.0F,1.5F,2.0F,3.0F,5.0F