Brand: Dorman Manufacturer's Part Number: 86598 Part Type: Circuit Testers Product Line: Dorman Circuit Testers Summit Racing Part Number: RNB-86598 UPC: 037495865982 Quantity: Sold individually. Notes: Uses 1 AA battery. For use on 6 V or 12 V DC systems. Dorman Circuit Testers Live wire! It's a popular phrase used in nearly every walk of life--but tradesmen are specifically concerned with its electrical application. That's why you'll find mechanics， electricians， and builders carrying Dorman circuit testers in their pocket. Depending on which model you select， these small tools can test circuits and continuity for basic 6 and 12 V systems … or voltages up to 250 V. They're great for reaching into tight spaces， and are available with either analog or digital readings. Dorman circuit testers should be part of your standard electrical equipment.