This new automotive electronic relay tester is designed for checking 12V 4-pin and 5-pin car relays, making it a practical diagnostic tool for basic vehicle electrical troubleshooting. It may suit DIY car owners, mechanics, or anyone replacing or testing relays before installation. The item is listed as new and includes free shipping, which can be useful when comparing total purchase cost. If you need a simple relay testing tool for automotive use, this model may help confirm whether a relay responds during inspection. Check the listing for full details, especially if you need more information about compatibility, included parts, or intended use with specific vehicle systems. New Automotive Electronic Relay Car Relay Tester -4/5Pin 12V Car Diagnostic Tool. Condition: New, Made in China. Listed at 7.77 USD. Tester: 4.33in/110mm (L) × 2.24in/57mm (W) × 1.06in/27mm (H). Insert Relay : Place the relay into the corresponding 4-pin or 5-pin slot (switch the toggle as needed). Test : Press the “TEST” button.