The INNOVA Digital Test Light offers quick voltage readings of electrical circuits. Simply connect the 5 foot extension cable to the battery and use the metal probe to test circuits. Two color LEDs show low or fully charged voltage (red = low / green = good). The INNOVA Digital Test Light is ideal for checking voltage on electrical wiring, fuses, batteries, sensors, switches and motors. It quickly and safely tests power and ground on all vehicles, including computerized controlled engines.