2016 NEW Digital LED Car Truck System Battery Voltmeter Voltage Gauge Volt Meter 12V 24V Description: 1.Voltage: only used for DC12v/24v car 2.Color: black 3.Screen digital color: red 4.Installment: insert the jack of the product into a cigar socket Features: 1.Brand new and high quality. 2.This digital gauge displays the voltage of batteries in the car. 3.With high brightness of LED there is no difficulty in seeing the display. 4.Powered by car cigarette lighter charger. 5.Constantly monitor battery voltage, extend and protect the battery and engine life. Installment: 1.Clean the Cigar socket. 2.Insert the jack of the product into a Cigar socket. 3.What kind of batteries is healthy: 4.When engine running(do not drive), the LED display: 5.Between 13.5 to 14.5(12V Car) 6.Between 26.0 to 28.0 (24V Ca r ) 7.When the engine of, and nothing rurned on, the LED diplay: Greater than 12.0 (12V Car) Or 24.0 (24V Car) Package included: 1 x voltage monitor 
