Worry-Free Warranty : You will get 1 x network switch and 1 x user manual. Buy now and start enjoying our 30-Days money back and an 18-monoths replacement warranty and lifetime technical support. 6KV Lightning Protection: Our poe injector adopts surge protection design and makes it can be used in harsh environment and can survive from lightning strikes up to 6KV. Industrial grade: Outdoor switch are made of industrial aviation aluminum material, with heat dissipation performance far superior to ordinary metal shells. The working temperature is -40 ° C to 80 ° C (-40 ° F to 176 ° F), and the protection level is IP40. Suitable for outdoor work in harsh environments. Universal for DC 12V-48V: Please note that this product is used in industrial field. If you use AC power supply, you must be equipped with “PSU” to convert AC current into DC current.The ethernet switch support 12~48V DC redundant power input. Gigabit Switch:5x10/100/1000Mbps RJ45 with auto-MDI/MDI-X function,30W POE power supply,Supports IEEE 802.3at/af,9K Bytes Jumbo Frame.