Lisle 28830 DIGITAL CIRCUIT TESTER 3-49V
Heavy-Duty Circuit Tester with Digital LCD Display to Accurately Show DC Voltage. Operating range of 3-49 volts DC to work on most vehicle electrical systems. 360? visibility of polarity. The red light indicates positive polarity, green indicates negative polarity. Long, 12ft. coil cord and heavy-duty alligator clamp for secure connections. The probe is insulated to prevent the possibility of shorting the side of the probe to other components.