Cabos Industrial PoE Switch 4 Port Gigabit SFP Optical Ethernet Network Switch (No Power Adapter) 2 x GbE Ethernet uplink ports, RJ45, 10/100Mbps, IEEE 802.3af/at Unique thermal design, wide operating temperature range -30C ~ 60C MTBF up to 150K hours, designed for 24-hours-working surveillance system Maxium PoE output up to 60W/port Plug and play installation, nonprofessional can quickly install it