The Voltage Tester Tool consists of a probe or sensor that is brought into contact with electrical components to assess the presence and magnitude of voltage. It incorporates such as LED light as a visual indicator to provide real-time voltage presence to the operator.Attributes:• Encased in rugged, high-impact plastic housing which is grease and chemical-resistant• Used for voltage range from 12 to 36 volts Applications:The Voltage Tester Tool is used for quick check for voltage present in a circuit. The bulb lights brightly when connected to 36 volts and gets progressively dimmer with lower voltages.