Dual display: Simultaneously shows battery voltage and temperature in Fahrenheit. Compatible with 12V and 24V systems, with a temperature range from -12 to 160°F. External temperature sensor provides accurate readings by avoiding direct heat and sunlight exposure. Safe and easy to read: Built-in fuse ensures safe operation. Bright LED display is clearly visible even in low-light conditions. High performance: Constructed from durable ABS and metal materials, resistant to wear and oxidation. Low power consumption, fast response, and reliable for real-time monitoring. Simple installation: Connects directly to the cigarette lighter socket; no additional wiring or modifications required. Multifunctional gauge: Accurately displays vehicle voltage and coolant temperature. Blue LED backlight ensures visibility from all angles and in various lighting environments. Displays battery voltage and interior temperature simultaneously in Fahrenheit. Features a built-in fuse and clear LED display for improved readability. Durable design with low power draw and quick measurement response. Powered via cigarette lighter port for easy setup. Provides precise voltage and temperature readings with blue LED illumination visible in all conditions.