5V/3.1A dual port USB car charger with led

   5V/3.1A dual port USB car charger with led

Battery voltage monitoring function 1 
1) insert the baby into the car cigarette lighter socket, the screen shows the car battery voltage.
(2) can be used for the 12 v cars, SUV, can also be used for the 24 v truck, bus (24 v in not more than 50 minutes) to avoid hot melts.
(3) but because of the different models of battery and generator, stabilizer, the significance of different voltage is not the same.This baby only tries to faithfully reaction car battery voltage.
Function 2: double USB output rechargeable cell phone charger. Digital camera. The camera. The tablet...
Feature 3: test current
4: display the temperature
 
characteristics
Part 1, car charger,
Duplex 3.1 A USB output, built-in PTTC over-current protection function, when the input or output current is greater than the current set security, the system automatically cut off power supply, unplug the machine automatic recovery use, inserted into the cigarette lighter will automatically display the current temperature inside the car, after the output current and input voltage, rotation every 20 seconds.
The input voltage: DC 12 v and 24 v
Output voltage: DC 5 v
Output current: 3100 ma
Conversion efficiency: ninety-five percent
Voltage measuring range: 5 V - 25 V error of plus or minus 0.2 V
Current measuring range: 0-3.1 A plus or minus 0.1 A error
Temperature measurement range: - 20 degrees to + 80 degrees of error of plus or minus one degree