?After-sales service? Electronic products will have various unexplained failures. We provide one-year after-sales service for renewal. Within 1 year from the order, only replacement is not repaired. ?Network cable short-circuit protection mechanism?STEAMEMO POE switch is stable and has strong anti-interference ability, protect the fault caused by the short circuit of the network port.Short Circuit, Over Current and Over Voltage Protection. ?Fanless design?The fanless design makes poe switch work without any noise. ?Built-in power supply?The power supply is located in the poe switch body and integrated with the switch. It is simple and light. After connecting to our AC Power Cable, the switch can transmit power to the equipment connected to the switch. ?AI PD Detection?The poe port will intelligently judge whether the device connected to the port needs power supply. If it is a non-poe device that does not need power supply, the switch will not supply power to these devices and will not damage the device. ?AI Watchdog function of poe port?Turn on the VLAN switch,When the data or power transmission between the poe port and the terminal device is abnormal, the corresponding poe port of the device will automatically detect the problem and restart the connection. ?4KV Lightning Protection?STEAMEMO PoE switch have professional lightning protection design-up 4KV port and power supply thunder prevents, with two levels of protection design respectively, effectively restrain the power of lightning from cable, which equivalent to give the entire network monitoring system with a security fence. ?4 gigabit poe switch@52W ?PoE switch with 4 1000M PoE port + 1 1000M Uplink port,1 x 1G SFP,4×PoE ports providing up to 30W per port, total PoE budget 52W.1 gigabit ethernet Uplink Port for connecting NVR and Internet , etc.. ?Active poe switch with 802.3af/at compliant?STEAMEMO poe switches support poe devices and non-poe devices, But when connecting passive poe device or non-poe device,the switch can only transmit data and cannot power your device,so the connected device needs to be separately powered. Or you can use it with active poe splitter. ?VLAN mode ?VLAN mode(Turn on the VLAN switch) support isolate 4 PoE+ port from each other. It is easy for this 4 port PoE switch to manage and maintain ,Prevent broadcast storms, Prevent data confusion, Wireless networking application data is more stable.