Features:1. Product design for some cigarettes, use, directly inserted into the car cigarette lighter, very convenient Input voltage 2.12-24v, can be used in automotive, truck, rv, boat, bus, etc3. The thermometer can test the temperature-10-80°C, can at any time within the current temperature of the car condition.4. The voltage meter can measure the voltage of 8-36v, pay close attention to the voltage of the car at any time, can timely deal with the failure and ensure the safety of driving5. This product is a charging circuit adopts special high efficient IC design, with fastidious advances, charging for a long time without fever, prolong the service life, ensure the safety of useAuto car seal voltmeter with cigarette lighter type thermometer voltmeter thermometer dual LED display 12VDetechnical data:Name: car one voltmeter + thermometerModel: CS - 302Size: 4cm diameter, length: 7.5cm Material: ABS environmental protection, intelligent surface IC Light color: red+blue, red+red, red+green displayInput voltage: 12 to 24V Voltage measurement range: DC8-36V Temperature measurement range: - 10-80 °C Installation method: use, directly inserted into the cigarette lighter car interior can be normal use1 x LED Dual Digital Voltmeter Thermometer