Highlight: Can measure the voltage of your car to avoid excessive current Measure the temperature inside your car and charge your phone quickly 2-Port USB Charger can charge for two different devices at the same time Compact design, easy to carry, convenient to use Simply Plug into cigarette socket, instant comfirmation of battery voltage, Low power consumption and high light display Led display, pleasant to look Specifications: Material: Plastic+Metal Color: Black Display Light Color: Blue+Red/Green+Red Voltage: 12V/24V Output Voltage: 5.0V Max. Output Current: 2.1A Voltage Measuring Range: 0-30V Temperature Measurement Range: -10°C-70°C Size: about 97x55mm/3.82x2.17"(LxW) Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thank you! Package Contents: 1 x Car Charger Voltmeter Thermometer