Features:Multi-function car LCD digital displayWith car charger, and can real-time monitor temperature and car voltageTo ensure the safety of your carEasy to install, no needed the professional skillA special car thermometer with stylish and lightweight designProvide extremely convenienceFunction 1: Car-Mounted ChargerFunction 2: Simply plug into cigarette socket, Instant conformation of voltage, Low power consumption high light dispalyFunction 3: Digital ThermometerSpecifications:Color: BlackLCD Indicator Color: Blue+red/Green+Red, Red+RedVoltage Measuring Range: for Dc 8-40VInput Voltage: 12~24VOutput Voltage: 5.0VMaximum Output Current: 2.1ATemperature Measuring Range: -10~80Length: 8cm/3.15"Diameter: 4cm/1.57"Quantity: 1 PcNote:Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item.Thank you Package Contents:1 x USB Car Voltmeter Thermometer