Switch Control:The voltage gauge waterproof a more accurate battery voltage. You can toggle between voltage and battery percentage or turn it off to reduce battery drain while in storage. Multiple Protections:Maximum input voltage 48V with Over-current, Over-volt and Short Circuit Protection, well protects the whole circuit, reliable and safe for using.Battery Capacity Voltage Monitor Gauge Indicator better helps you to early notice your car voltage condition. Digital Voltage Gauge Input Voltage and measurement range:5-48V,Power display range 0-100%,Precise 3-bit LED digital display Easy To Use And Install: 2 terminals,with Lock fastener for stable mounting, Fits to almost all panel locations you desired! Use Widely; Fit for 5-48V Cars, motorcycle, bus, ship, yacht, RV, pickup, truck, trailer, etc. See more product details The waterproof voltmeter gauge is easy to read displaying the real time of monitoring of battery voltage making it portable for you know the status of the battery helping you timely grasp the state of battery voltage between full charged and discharged of this DC voltmeter.