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Monitors voltage status of vehicle's battery and electrical system in time. Keeps your driving safe. Checks whether the connection is successful. Note: The voltage ONLY can be read After Connecting to power. The advanced full Aluminum Alloy body with scratch resistance technology keeps it sturdy and let the 12V USB outlet always look like new. Upgrade metal car charger will not be overheating at high temperatures, which is safer than plastic one. With IP4 Splashproof grade against Sudden water splashes and dustproof by a rubber cover, protects internal circuit, effectively enhance its lifespan.







