USB Car voltmeter / digital auto voltage detector / battery voltage meter monitor detector count

USB Car voltmeter / digital auto voltage detector / battery voltage meter monitor detector count

Features:
1.This digital gauge displays the voltage of batteries in the car
2.With high brightness of LED(light-emitting diode)there is no difficulity in seeing the display
Installment:
1.Clean the cigar socket
2.insert the jack of the product into a cigar socket
What kinds of batteries is healthy
1.when engine running(do not drive),the  LED display:
Batween 13.5 to 14.5(12V CAR)
Batween 26.0 to 28.0(24V CAR)
2.With the engine off,and nothing turned on,the LED display:
greater than 12.0(12V CAR) OR 24.0(24V CAR)
Attenion:
1.For DC 12V or 24V CAR
2.Measuring range:DC 8V-30v+/-1.2%
Product weight:24.8g
Package weight:461g