The OEMTOOLS 12 V Battery Tester is a safe, fast, and simple battery charging system analyzer. This 12 volt tester has LED indicator lights that show your alternator or battery's condition. Our 12v car battery checker tool works with a wide variety of automobiles for universal compatibility, including cars, trucks, golf carts, RVs, and more. The heavy duty battery tester is durable yet lightweight enough for convenient portability, making it easy to take these car battery testers anywhere you need them. This car alternator tester includes easy-to-read red, yellow, and green indicator lights, providing a clear status reading of the health of automotive batteries and alternators. These battery testers for cars offer quick and accurate results, helping you determine when it is time to replace your battery or alternator. 12V BATTERY CHECKER FEATURES: (1) 12 Volt Battery Tester; Red, Yellow, and Green Indicator Lights; Universal Fit; 8-15VDC Voltage Range; LED Display; Negative and Positive Battery Probes; Negative Battery Clamp; Lead Set.