Active 4 port poe switch with 802.3af/at compliant: Goalake poe switches unmanaged support poe devices and non-poe devices, but when connecting passive poe device or non-poe device, the switch poe can only transmit data and cannot power your device, or if you want to transmit data and power them at the same time, you can use it with an active poe splitter. | 4 port poe switch*100M@52W: Goalake PoE switch with 4 port PoE + 1 Uplink port with a total PoE budget of 52W, providing up to 30W per PoE port. The fourth port can be used as a poe port or an uplink port, 1 port uplink ports for connecting to NVRs, the Internet, etc. | 4KV lightning protection: Goalake Ethernet PoE switches have a professional 4KV lightning protection design power protection to effectively suppress lightning power from cables, which equivalent to give the entire network monitoring system with a security fence. | Network cable short-circuit protection mechanism: Goalake POE switch 4 port is stable and has strong anti-interference ability, prevent short circuit, overvoltage and overcurrent. | AI Watchdog function: The AI watchdog of Goalake 5 port PoE switch allows the poe port to automatically detect data or power transmission problems between the port and the end device and restart the connection. | AI PD Detection: The AI PD Detection of Goalake PoE+ network switch unmanaged allows the poe port to automatically detect whether the device connected to the port needs power supply. The switch won't power those devices if they doesn't need to, and certainly won't damage them. | AI Extended to 250m: Turn on the extension(E) switch, the poe switch enters the AI mode(POE port will judge whether it enters the ultra-long distance (820ft/10Mbps) mode according to the actual situation). 250 Meters Extend function extending max power and data transmission distance from 100 meters(330ft) to 250 meters(820ft). | Plug and Play & Metal Design: Sturdy metal casing of Goalake PoE switch 4 port vlan makes the Ethernet poe Switch reliably in various environments. The plug and play design makes set up easier than ever before, no IT professional required. built-in power supply, simple and light, does not take up space. | Fanless Design & LED Indicators: The fanless design of Goalake 5 port Switch poe makes poe switch unmanaged work without any noise to ensure stability. it has good build quality, and good heat efficiency - even in summer's heatwave. LED indicators for each port, quickly check Working status. | 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.