Stayhome 1PCS 12V (10V-17V) to 19V 3A DC to DC Step Up Converter Boost Car Laptop Supply Module Adapter for 19V 2.1A 40W 2.37A 45W Notebook

The Waterproof Battery Detector is a must-have tool for any car, motorcycle, or truck owner! With its 0.40" blue LED digital display, this voltmeter measures DC voltage ranging from 2.5 to 30V with an accuracy of 1% (+/-) and a refresh rate of about 500mS.

Its epoxy potting and full waterproof design make it perfect for measuring voltage in wet or humid environments, while its oil pollution prevention feature ensures accurate readings even in the presence of oil.

The product also features reverse polarity protection and measures voltage directly without needing a power supply.

Plus, its compact size (40 x 25 x 23mm) makes it easy to carry around.

Don't miss out on this incredible tool for your vehicle!