Car USB charger to measure battery voltage digital display with voltmeter thermometer

Function 1: Suitable for 12V/24V models, display the temperature inside the car
Function 2: Plug it into the car cigarette lighter socket, and then display the car battery running and battery voltage
Function 3: 3.5V 2100MA USB charging interface
Suitable for 12V and 24V batteries
Material: ABS
Output voltage: 5.0v
Maximum output current: 2.1A
Working temperature: -9~70
Output interface: USB
Applicable charging range: 2A
Product size: 4.5*4.5*8cm