Industrial 5-Port Gigabit PoE Extender with 1-Port 802.3bt PoE to 4-port 802.3af/at Operating temp.: -40°C to +75°C- 5-Port 10/100/1000BASE-T Gigabit RJ45 Interface- Thunder. Lightning resistant- Built-in hardened PoE and PD controller- Can be cascaded up to 4 units or 500meters- Works in extreme environment -40°C to +75°C- Data Processing: Store and Forward- Flow Control: IEEE 802.3x Flow Control and Back Pressure- Jumbo Frame: 9KBThis PoE extender is equipped with 1 PD input to power up 4 Giga PSE output. It can be used as a standalone PD/PSE PoE injector or to extend PoE distance. It can be cascaded up to 4 units or 500 meters to deliver high power for your end device.