Solenoid voltage Tester tests AC/DC voltage from 120 - 480 voltage and DC Polarity. Offers dual voltage indication with a solenoid vibration and visual neon light bulb. Vibration indicates voltage while neon light indicates DC polarity. Built in slots in probe housing hold probes for one hand testing and storage. 4 feet reach from probe to probe with probes unlocked. High impact, dual insulated, case stands up to rugged service. Testing applications include outlets, panels, light fixtures, switches, circuit breakers and extension cords.