Plug this tool into the cigarette lighter port to quickly test your vehicle’s charging system. The alternator tester features three LED indicators to show your alternator’s output. The car battery tester also features three LED indicators to indicate strength of your battery’s condition.

• Plugs into cigarette lighter port for easy, accurate, hassle-free testing
• 3 LED indicator quickly shows battery and alternator status
• Compact - stores easily in your glove box