RioRand Waterproof Digital Car/Motorcycle Voltmeter Gauge 12V LED Panel Meter DC 3.5-30V 0.28" (Red) Powered by RioRand Advanced Technology Power voltage: DC 3.50-30.0V Measure range: DC3.50-30.0V (2-wire) Display color: Red/Yellow/Blue/Green Accuracy: 1% (+ / -1 digit)