QuickCar's Redline Volt Meter 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 voltage drops below desired readings. The lightweight plastic casing is perfect for high performance uses. Gauge includes mounting hardware. 69-007 does not require additional sending units, only the included power/ground harness is needed.