* Upgrade the power supply method. USB power supply and built-in battery versions are available for selection, making the operation simpler.

* It can be set as a 4 or 5-pin relay, and can be tested with one click, providing results in seconds.

* Built-in LED light, which can be used as a lighting lamp in narrow and dim environments.

* No need for a 12V battery supply. It can switch between working scenarios at will, enhancing work efficiency.