Comply with 802.3af/at PoE standard, the outdoor 4G router uses a LAN cable to transmit both DC power and Ethernet data. It supports a max 50-meter LAN cable. You can also power it up with a 12V DC power adapter. You can connect a network switch, second router, or computer to the LAN port on the PoE injector to extend the 4G internet to an indoor area.