The Lisle Relay Pro 12-24V Relay Tester - 60150 is the perfect solution for anyone who needs to test and troubleshoot automotive relays. This tool is designed to quickly and accurately test relays for proper operation. It features a bright LED display and a built-in audible alarm that alerts you to any problems. The Relay Pro 12 can test up to 12 different relays at once, making it ideal for testing multiple relays in a single vehicle. It's easy to use and provides quick, accurate results. With the Lisle Relay Pro 12-24V Relay Tester, you can quickly and easily diagnose any relay-related issues.