The Lisle Relay Test Jumper Kit 1 is a reliable and efficient diagnostic tool designed for passenger vehicles. This kit, manufactured in the United States by Lisle, supports a 12V DC system and features a relay tester for troubleshooting automotive issues. It is compatible with CAN interface vehicles. The kit is a valuable addition to any mechanic's toolbox, providing a convenient solution for testing and diagnosing vehicle systems. I haven't had to use it much, it in great shape. Buy with confidence!