:Working temperature: -10~80 degrees CelsiusOutput current: 2.1mAOutput interface: USBFunction 1 - Car battery voltage ing①Plug this product into the car arette socket, and the car battery voltage will be displayed on the screen.②Can be d in 12V cars and SUVs, and can also be d in 24V trucks and bs.Function 2 - Car temperature measurement① Can measure the temperature inside the car from -10~80℃.② In order to accurately measure the temperature, the temperature r is pd outside the product. You can bend the r when using it to avoid the heating parts of the car that may affect the measurement results.Function 3 - USB charging output① Ar inserting this product into the car arette , a stable voltage of 5.0-5.1V can be output from the USB output port on the side, which can charge mobile phones, dial cameras, dial s, tablets, etc. with a charging current of 0-2.1A. Charging dial products.②. The charging circuit of this baby adopts a special high-efficiency IC design, with exquisite materials. It does not generate heat during long-term charging, which is far better than the car chargers on the market.