Built-in cooling fan with thermal sensor keep the power supply cool, reduce noise and extend lifespan. High precision, high reliability and perfect current limiting protection, thermal protection and voltage overload protection functions. When the output voltage or current exceeds the protection value, the output be automatically turned off to prevent damage to the load. Widely used in homes, laboratories, schools, equipment maintenance, various battery charging, etc. If the fuse is blown, you can replace the fuse. Type:B:With WIFI Communication Colour:As Shown Material:Plastic Package Contents: 1 * Step-down module + remote controller + communication line Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.