• Self-powered tester will check all voltage circuits and wiring, with the vehicle power off
• Uses standard AA battery. Battery included
• Test radio, T.V., appliances, electrical circuits, switches, voltage regulators, coils, fuses, condensers, armature and alternator diodes
• Bulb is mini screw base 1.5 V industry standard No. 112, purchase locally
• Lead is 36" long
