Centaur Convertor with Balck Metal Box Features: -Converts RS-485 protocol to RS-232 / USB protocol -Allows a total of up to 1220m (4000 feet) of RS-485 -Utilizes UTP cable (Cat 5) -Transmit, Receive and Power status LEDs -Power Requirements: 12Vdc -Current consumption: 100mA max -Operating temp: -10°C to 55°C (14°F to 131°F)