4-en-1 Horloge de voiture numérique Thermomètre intérieur/extérieur Batterie Voltmètre (12V/24V) Affichage LCD Deux Tons

【Multifunctional】Synchronously displays the time/date and indoor/outdoor temperature (-10°C to +50°C). Batteries (included) hold the LCD display, while cigarette lighter connection is required for backlight and voltmeter 【Battery Voltmeter】Monitors the health of your battery in real time with a graphic indicator (from "Discharged" to "Excellent"). Note: To measure the voltage and activate the safety alert, the device must be connected to the cigarette lighter socket (12-24V). 【Compact Design & Size】An ideal format that does not obstruct the view: 9.5 cm (length) x 6.8 cm (height) x 2.5 cm (thickness). The 180° swivel mount has a base of 4.5 cm in diameter, allowing a stable attachment to any dashboard 【Temperature Accuracy】Equipped with a high precision probe (error ±2°C). Expert tip: Temperature varies by location (dashboard exposed to the sun vs air-conditioned area). For real measurement, avoid exposing the probe to direct heat from the sun 【Power Source】Dual power supply: works via cigarette lighter socket (12-24V) or 2 LR44 batteries (included). Batteries are only for the time/date memory (avoiding reset), while plugging into the cigarette lighter is essential for backlight and voltmeter