QuickCar's Redline Oil Temperature Gauge is a 2-5/8" electric stepper motor gauge that features an adjustable warning level. The warning function changes the backlighting from white to orange/amber and flashes as the oil temperature rises above desired readings. The lightweight plastic casing is perfect for high performance uses. Gauge includes mounting hardware. 69-009 does not include sending unit (Pt.# 63-225) that is required for the gauge to function.