Multifunction digital display This car voltmeter and thermometer features a dual LED monitor for realtime temperature and voltage measurement. It provides accurate readings for 12V and 24V systems, keeping you informed about your vehicle's electrical status. Easy installation Designed for quick setup without requiring professional skills. Simply insert into your vehicle's power outlet to instantly monitor battery voltage and interior temperature, enhancing your driving experience and safety. Wide measuring range The digital thermometer measures temperatures from 9 C to 80 C (15.8 F to 176 F), while the voltmeter accurately displays your vehicle's battery voltage. This wide range helps you stay aware of your car's conditions. Compact and elegant design With a sleek black finish and a compact size of 76 x 47 mm, this device blends seamlessly with your car's interior. Its lightweight construction and modern look add a touch of sophistication to your vehicle. Use scenarios Daily commuting: quickly verify cabin comfort and battery status before starting the engine. Winter driving: monitor interior temperature and battery voltage to anticipate coldstart issues. Fleet or multiple vehicles: easily check the status of several vehicles from a single device.