12V CAR LED Intelligent digital voltmeter battery tester flashing warning

Display type: 7-Segment, 3 Digital Red LED
Measurement Range: DC7-20V
Working Current: £¼30mA
Accuracy: ¡À0.2%
Resolution: 0.1V
Conversion Rate: 2-3 Readings/Sec
Size: 100 x 29 x 26mm
Cigarette lighter line length: 1.2m
Weight: about 65g
Functional description:
1.The 12V car dedicated
2.Battery voltage display£¨Voltage measurement Range: DC7-20V£©
3.Voltage too low and too high display£ºWhen the battery voltage is lower than 11.5V and higher than 14.8V images flashing warning. 
Installation instructions: 
Simple to use plugs directly into your vehicles cigarette lighter,display the current voltage real-time data immediately,use double-sided adhesive, can be in the line of sight within the permitted scope of freedom paste.
Note:
Normal vehicle battery voltage 12.5V¡À0.3V, start the generator operating voltage is 14V¡À0.5V.
If the voltage is below 12V, may be the battery aging, line leakage or vehicles have not been used.
If voltage drops below 10.5V , battery replacement, or battery charge.
If the voltage is above 14.8V or even more than 15V,the alternator is certainly bad, already can not automatically adjust the voltage,And quickly turn off!

Package Contents 
1 X Blue/Red Car Digital Voltmeter