Features: The small circuit breaker tester quickly identifies line faults, making it ideal for complex circuit setups and regular maintenance by electronics repairers and DIY enthusiasts. Equipped with a 4MM banana plugs, it ensures smooth connection with various testing devices, increasing flexibility in testing facilities and industrial applications. Includes 5 small circuit breakers, easy to carry and store, perfect for engineers and technicians requiring mobile instrument. Crafted from premium materials, it offer enduring stability, reducing errors from wear, suitable for frequent professional testing. No tool required for fast installation and disassembly, improving efficiency and saving time, ideal for field repairs and urgent troubleshooting. Specifications: Component: copper/copper Connection method: forwarding/reset Properties: Equipped with 4MM banana plugs connectors, suitable for a variety of devices Use scenario: suitable for electronic maintenance, laboratory testing, electric work Practicality: Lightweight and convenient, easy to operate, suitable for professional and DIY enthusiasts Package Includes: Set of 5 Small Circuit Testers note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.