Professional 2 in 1 LED Tachometer Gauge Digital RPM Voltmeter for Auto Motor Rotating

we adopt 0.36in digital tube, suitable for 1~8 cylinder autos and motors 12V engine. Our products are with shells and shine brighter. Display voltage before and afrer engine start. Professional 2 in 1 LED Tachometer Gauge Digital RPM Voltmeter for Auto Motor Rotating brand new and high quality Features: we adopt 0.36in digital tube, suitable for 1~8 cylinder autos and motors 12V engine. Our products are with shells and shine brighter. Display voltage before and afrer engine start When 12V car over voltage overvoltage or undervoltage, it will be flashing alarm. When voltage is less than 11V15V), it will flickering alarm and display the real voltage. Specification: Working Voaltage: 8v~17v Working Current: 40mA Voltage Accuracy: ±0.1V Rotating Accuracy: ±30round/min Maximym Rotating Gauge: 100-31800round/min Bulb Color: Red Quantity: 1 Pc Other Fixtures: 1. This Auto car RPM meter 2 in 1 function meter use Ultra bright 0.36 inch digital tube digital display instrument, driven by high per