DescriptionSpecial Features : Voltmeter Digital BatteryMaterial Type : MetalItem Weight : 0.14kgItem Height : 1inchItem Width : 1inchItem Length : 1inchExternal Testing Certification : ISO9001Model Name : ElectricItem Type : Motorcycle SwitchesElectric Bicycle Thumb Throttle Voltmeter Digital Battery Voltage Key Switch Power Key Lock Electric Bike AccessoriesInformationType: Electric car speed controlModel: S series (5V-99V automatically recognizes electric vehicle voltage)Efficiency: 98%Working voltage: turn DC0.8V-4.2VPower display: voltage digital display is wide voltage, 1-100v, regardless of lead-acid battery, lithium battery, regardless of voltage, can be automatically identified (12V, 24V, 36V, 48V, 60V, 72V electric vehicles can be directly Use, part of the 84V electric car is also available.) The light display must leave a message v, not a wide voltageSpecifications: electric vehicle universal accessoriesVoltage display turn advantage:1, regardless of lead-acid batteries, lithium batteries, water batteries, dry batteries.2, regardless of the various types of electric vehicles (12V to 99V universal), can be automatically identified, real-time display.3, eliminate the analog power display (several small lights), real-time digital voltage display, intuitive, convenient, can accurately determine the remaining power, mileage.4, through the voltage figures to determine the electric vehicle failure, with half the effort.Moedl :Option 1 : with the voltage displayOption 2 : Without the the voltage displayPlease pay attention to the option before you order ,thanks,friend