LED digital display: Accurate 3-bit LED digital display, easy to read, real-time monitoring of battery voltage, easy for you to know the battery status Quality premium: high-level waterproof design, high-resolution digital LED display shows battery status even in adverse situations Wide applications: works for 12V-24V, to monitor battery voltage battery of motorcycle, boat/ATV/UTV/RV/RV/RV/travel trailer, etc. Easy to install: Mini size, just plug it into your car. With reverse connection protection function, the line will not be burned Material: environmentally friendly plastic cover Display:LED Input voltage: 12 - 24V Measuring range: 5 - 48V Dimensions: 3.6 x 2.9 x 1.5 cm Connection type: anode and cathode Meterial: Environmentally friendly plastic cover Features: Battery status display between fully charged and discharged LED display, the number easy to read Monitor battery voltage, with reverse polarity protection, the line will not be burned Scope of delivery: 1x voltmeter