Features: 1. The product is designed in a cigarette lighter plug style, allowing direct insertion into the car's cigarette lighter socket for convenient use. 2. Input voltage range of 12-24V, compatible with cars, trucks, RVs, boats, buses, and other vehicles. 3. Built-in thermometer measures temperature from -10°C to 80°C, enabling real-time monitoring of the vehicle’s internal temperature. 4. Voltage meter measures DC 8-36V, providing continuous monitoring of the vehicle’s battery voltage for improved safety and early detection of potential issues. 5. Equipped with a high-efficiency IC charging circuit design, ensuring stable performance, minimal heat generation during extended use, prolonged service life, and enhanced safety. Product Name: LED Dual Digital Thermometer Voltmeter Model: CS-302 Diameter: 4 cm Length: 7.5 cm Material: ABS environmental protection material, intelligent IC chip Display Light Color Options: Red + Blue, Red + Red, Red + Green Input Voltage: 12-24V Voltage Measurement Range: DC 8-36V Temperature Measurement Range: -10°C to 80°C Installation Method: Plug-and-play, directly inserts into the vehicle’s cigarette lighter socket Package Includes: 1 x LED Dual Digital Thermometer Voltmeter