A PoE+ switch with a 120 power supply and a silent cooling system, featuring independent control switch for Extend, VLAN, Watchdog feature.Reliable PoE for 24/7 Consistent OperationIEEE 802.3at/af. Up to 30W Per PortEach PoE port delivers up to 30W of power, making it suitable for access points, IP cameras, digital signage, and most other PoE devices.PoE Auto RecoveryTurn on the Watchdog function to monitor port activity. If a connected device freezes and stops transmitting data for 5 minutes, the Watchdog will automatically reboot the corresponding PoE port.Built-In Modes for Practical Use CasesVLAN Isolates Downlink Ports for Improved SafetyTurn on the VLAN mode to prevent client-side hacking, preventing sensitive data from leaking. The downlink clients will only be able to communicate with the uplink devices.Extend for 250 m TransmissionFor long-distance networking, enable the Extend mode to connect clients up to 250 meters away by limiting the port speed to 10 Mbps.Exceptional Built-Quality for Stable OperationBuild Robust Systems with Outstanding EMCImproves service reliability and reduces downtime caused by power surges and ESD. ESD: Contact 6kV; Air 8kV Surge: Power DM 2kV, CM 4kV; RJ45 CM 4kVShielded Ports. Solid Metal CasingEnsures stable operation with Ethernet ports shielded with nickel-plated cooper alloy and robust SPCC metal casing.Versatile Scenarios Surveillance Office Networking Campuses Wi-Fi Accesses and Signages