Product name: Relay Tester Material: ABS plastic Size: 12-24V - Wide voltage compatibility design: supports 12V and 24V dual voltage detection, suitable for relay testing of various cars, trucks, and engineering vehicles, ensuring strong compatibility with different battery systems. - Multi-function test interface: equipped with dedicated slots for four-pin and five-pin relays, enables quick identification of relay type and detection of parameters such as pull-in voltage, release voltage, and contact resistance, offering simple and efficient operation. - Accurate voltage testing: built-in high-precision digital display shows real-time battery voltage and relay working status, with a small error range to ensure reliable test results and assist in troubleshooting. - Portable and durable design: lightweight body with impact-resistant housing, includes test wires for easy carrying in vehicles or use in workshops; anti-interference design ensures stable performance in complex electrical environments. - Safety protection features: includes overvoltage protection, reverse connection alarm, and automatic power-off function to help prevent damage to equipment or vehicle circuits due to incorrect operation, providing safer and more reliable usage. Package Includes: 1 x Automotive Relay Tester (12/24V Universal)