Package included1 pcs 48V Blue Digital Volt MeterInstallationThis is an extremely easy process with its 2-wire setup.We can provide general installation instructions to guide you through the process.SpecificationDisplay Color: BlueDimensions: 1.6″ x 1″ x 0.79″Refresh Rate: 0.5 SecondDesign: Waterproof, Dust-proof, Shock-proofVoltage Range: Up to 56VThis voltage meter will give you a real-time voltage reading from your batteries.You will never have to risk being stranded from your batteries going dead.