Features:<br> LED display cigarette lighter electric voltage meter for auto car battery.<br> Car battery voltage display.<br> Powered by car cigarette lighter charger (DC 12~24 V).<br> Installation: Insert the jack of the product into a cigar socket.<br> This digital gauge displays the voltage of batteries in the car.<br> With the high brightness of the LED(light-emitting diode), there is no difficulty in seeing the display.<br> Installation: Clean the cigar socket. Insert the jack of the product into a cigar socket. <br> <br> Description:<br> Display Type: Digital<br> Operating Temperature: -10 to +80 Celsius degree<br> Accuracy Class: high<br> Item Type: Battery Testers<br> Voltage: DC12-24V<br> When the engine running (do not drive), the LED display:<br> Between 13.5 TO 14.5 (12V CAR)<br> Between 26.0 TO 28.0 (24V CAR)<br> With the engine off, and nothing turned on the LED display:<br> Greater than 12.0 (12V CAR) OR 24.0 (24V CAR)(for reference only)<br> Measuring range: DC 8V-30V±%1.2<br> <br> Specifications:<br> Color: Black<br> Material: Plastic<br> Size: 70*40*30mm<br> <br> Packing content:<br> 1 x Electric Voltage Meter <br> <br> Note:<br> Please pull out the device when you leave your car, do not use the device for more than 2 minutes in 24V cars, or it will burn out.