Features: Waterproof Voltmeter features a 3 digital LED display for precise 30 200V monitoring, with overvoltage protections to safeguards vehicle batteries and connecting devices. Upgraded with casing and isolated circuitry, this digital voltage gauges delivers stable 2.4A output and intelligent USB charging compatibility for optimized device power delivery. Ideal for automotive technicians, electric bike owners, and marine enthusiasts requiring realtime battery voltage tracking in 30V -100V systems across car, trucks, boats, and . Monitor charging efficiency and prevent electrical failures during road adventure, marine expeditions, or daily commutes in harsh weather conditions with waterproof construction. Combines voltage measurement and USB charging functions in a convenient design, featuring reinforced input/output isolation to eliminate leakage risks while ensuring accurate battery diagnostics. Specifications: Component:Plastic Dimension: 60x43x29mm/2.36x1.69x1.14inches Color:Green/Red Input voltage: DC30-100V Suitable for batteries: 36v//60v/72v/84v Working temperature: -10~60 ° C Measurement accuracy: better than 0.5% Output voltage: DC5V Static current: 10mA Package Includes: 1Pc Digital Display Electric Vehicle Voltage Meter note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.