Klein Tools 69115 Wiggy Solenoid Voltage Tester Genuine Wiggy solenoid voltage tester for 120 volt to 600 volt AC, 50/60 Hz, or 120 volt to 600 volt DC current Locates blown fuses, grounds, and system leaks quickly UL and CSA approved Large, easy-to-read voltage indicator scale and DC polarity indicator Operates without the use of batteries