RioRand&reg; Waterproof Digital Car/Motorcycle Voltage Tester Panel Volt Meter Voltmeter Gauge DC 12V 0.28" 2-wires (Blue) 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)