ProParts P346328 Spek-Pro 2-1/16" Electric Water Temperature Gauge (100-300 Degree F, 52.4mm) 7 color user-selectable background illuminations (red, blue, green, white, yellow, orange, and violet) with adjustable brightness for day and night - with independent dimming of dial and pointer. Configurable "High" and "Low" warnings using three on-instrument-face buttons Pro-Control output enables a 1.5 amp load to activate a relay and trigger your choice of warning lights, external buzzers, fans, pumps, or features such as water/meth/nitrous injection. Features a peak recall function, which enables the user to review high gauge readings. The highest reading will be stored by the gauge until it is cleared. Solid-state data acquisition grade sending units provide unmatched gauge accuracy and withstand the harshest environments.