4 LAN POE Ports Injector Power Over Ethernet Power Supply for IP Camera 9-48V UK
Reboot all 4 devices from one central location. Use this device to inject power into the CAT-5, CAT-6 or CAT-7 cable. Standard Ethernet uses 2 of the 4 pairs, passive POE uses unused pins 4/5 for plus power, and 7/8 for ground.