Sea-Dog Round Voltage Meter - 6V-30V. Injection molded nylon construction with a red LED display. Volt meter input 4V-30VDC. Specifications for Sea-Dog Round Voltage Meter: Manufacturer: Sea-Dog Color: Black Voltage: 6 volts Features of Sea-Dog Round Voltage Meter Digital voltmeter Fits standard 12V receptacles Injection molded nylon construction Red LED display Designed for use in interior or fully protected locations only Package Contents: Sea-Dog Round Voltage Meter Sea-Dog 421615-1: Round Voltage Meter - 6V-30V