ATD Tools 5513 Heavy-Duty Circuit Tester Go to amazon.com Related posts Top 11 best circuit tester 12v: Which is the best one in 2022? FeatureHas 5 ft. heavy duty lead.Tests low voltage up to 28 volts. DescriptionEasily checks 6 and 12 Volt systems. Has 5 foot heavy-duty lead. Tough plastic handle lights up if circuit is good. Lead remains flexible in low temperatures.