2 in 1, double function, convenient and practical!That is, the USB charger, is also a car voltmeter!
Function 1—&Mdash; automotive battery voltage monitoring
1 Insert this baby into the car cigarette lighter, and the car battery voltage is displayed on the screen.
2 can be used for 12V cars, SUV, can also be used for 24V trucks, large bus.
3 The meaning of different voltages can be referred to the figure below.However, due to the different models of the battery and generator, the stabilizer is different, the significance of different voltages is different.This baby is only to reflect automatic battery voltage.
Function 2—&Mdash; USB charging output
One  After inserting this baby into the car cigarette lighter, output 5.0-5.1V stable voltage from the side of the USB output, mobile phone, digital camera, digital camera, tablet for charging current is 0-2.1a.The digital products are charged.
②  this baby charging circuit adopts special efficient IC design, exquisite materials, long-term charging does not fever, and far from the low-cost car charger on the market.
3 This model is compatible with Apple iPhone4S / iPhone5 / iPhone5S, and most Android phones.