Cat 3 to Cat 7 ethernet extender. The Enable-IT 860X PRO Gigabit Ethernet Extenders have a distance restriction of 3,000ft (914m) over 1-pair of copper wiring from device extension to device extension. You can add an additional 328ft (100m) onto the end of each 860X PRO LAN output ports for a total distance of 3,656ft (1.1km) from device extension to device extension. Ethernet: (4) LAN RJ-45 Standard 10/100/1000 Base-TX autosensing ports. Interlink: RJ-45 (1-Pair). Operational Temperature: -49°F to 168°F (-45°to 76°C) Humidity: 5% to 95%, non-condensing