GB GVT-392 Solenoid Voltage Tester, 120 to 480 VAC, 120 to 240 VDC, Neondicator Display, Functions:

Solenoid voltage tester tests AC/DC voltage from 120 to 480 V 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 ft 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.