Derale's Lighted Oil Temperature Gauge kit helps monitor critical transmission or oil temperatures to avoid overheating vital fluids and helping to save hundreds to thousands of dollars of damage to transmission or engine components. A modern black-on-white face with 140 degree-300 degree F temperature range and a 2 5/8 inch diameter, this accurate gauge includes a mounting bracket, 1/8 inch NPT sensor, transmission pan adapter/drain plug allows in pan sensor mounting option.