Review on Waterwich DC12-24V/0.1-10A Dual LED Digital Multimeter Amp Voltage Meter 2-in-1 Current Tester and Voltage Tester for Boat Marine Vehicle Truck ATV Car Camper LED Round Panel (Blue) - Improved SEO-Compatible Product Name by Daniel Ortiz

The meter is great for those hard to reach places but the wiring diagrams shown on the product page are tricky. The diagram above shows the correct and safe way to connect the meter to your system. However, the diagram below shows that a positive counter input requires two positive inputs. This can cause injury and possibly a fire. Ignore the diagram below and connect the meter to battery positive, battery negative and the center input grounded to the frame.