48V Voltage Meter Battery Gauge Features:Blue Led Digital Volt Meter,Water-Proof,Dust-Proof,Moisture-Proof,Shock-Proof,Oil- Proof Specifications: Dimensions: 1.6inch x 1inch x 0.79inch Refresh Rate: 0.5 Second Design: Waterproof, Dust-proof, Shock-proof Voltage Range:15-120V Color: Blue Installation: This is an extremely easy process with its 2 wire setup. Works with 12 24 36 48V Lead-Acid Batteries in Golf Carts, Forklifts, Trucks, RV's, ATV's, UTV's, Scooters, Boats and More. NOTE The power supply voltage used by this voltmeter should not be higher than 120V. Please pay attention to leave enough margin for the meter when using it to avoid permanent damage to the voltmeter due to motor sparks, power ripple or other excessively high sudden voltages. Because this voltmeter uses LED display and requires a certain working current, it cannot be used for high internal resistance voltage measurement, such as weak signal voltage and button batteries.