Features: 1.High efficiency USB 5V 2.1A output for fast charging. Apply to USB charging mobile phones or other electronic products 2.The thermometer monitors the air temperature clearly providing more comfortable atmosphere for you 3.Comes with voltage meter tester for real-time detect the battery voltage for your vehicle 4.It is easy to connect the battery. Using the cigarette lighter plug, just plug and play 5.It is suitable for most of 12V-24V vehicles, such as cars, SUVs, trucks, etc Specification: Features:_x000D_ _x000D_ High efficiency USB 5V 2.1A output for fast charging. Apply to USB charging mobile phones or other electronic products. _x000D_ The thermometer monitors the air temperature clearly providing more comfortable atmosphere for you. _x000D_ Comes with voltage meter tester for real-time detect the battery voltage for your vehicle. _x000D_ It is easy to connect the battery. Using the cigarette lighter plug, just plug and play. _x000D_ It is suitable for most of 12V-24V vehicles, such as cars, SUVs, trucks, etc. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Metal, Plastic _x000D_ Shell color: Black _x000D_ Input Voltage:12-24V _x000D_ USB Output: 5V 2.1A _x000D_ Connection: Cigarette Lighter Plug(Just plug and play) _x000D_ Temperature Measurement Range: -10 degrees to +80 degrees _x000D_ _x000D_ Display Color: Red thermometer display with green voltmeter display, _x000D_ Red thermometer display with blue voltmeter display(optional) _x000D_ Diameter: 4.3cm/1.69''_x000D_ _x000D_ Total Length: 8cm/3.14'' _x000D_ Package Weight: approx. 50g _x000D_ _x000D_ Package Included:_x000D_ 1 x 3 In 1 USB Car Charger Adapter PackageList: