Features Excellent Performance Chip: Adopt imported chip, with industrial design, has strong anti interference ability and effective lightning protection. Harsh Environment Durability: Can be used in industrial fields and on site in harsh environments, with an operating temperature of ‑40°C to +85°C. Long Transmission Distance: The transmission distance is kilometers, tested with 850m 2x1.5 cable, recommended to use within 800m, need to add a repeater if exceeds 800m. Development Support: Half hole process designed, with 0.8mm thickness, can be used as a composite board or for soldering terminal, adopt standard 2.54 spacing design, convenient for second development. 120Ou Matching Resistance: With 120Ou matching resistance, short connector 0 can match the resistance, recommended for long distance transmission. Specification: Item Type: TTL to RS485 Converter Module Material: ABS Package List:5 x TTL to RS485 Converter Module Package List 5 x TTL to RS485 Converter Module