Features: The industrial grade 4-port RS485 hub has electrical isolation function to assure naught data transmission in harsh environments. Four individual sufficient RS485 ports support parallel connection of multiple devices, with a transmission speed of up to 12Mbps and a transmission distance of up to 1200 meters. This product is designed for automation engineers, framework integrators, and technicians to manage distributed devices in manufacturing bushes. Optimize factory workshops, remote measurement units, and critical infrastructure that require strong communication under extreme temperature/trembling conditions. This plug and play RS485 transmit hub eliminates ground circuit obstruction and potential surges, and has industrial grade exhalation/transponder shielding capability. Specifications: Substance: ABS. Size: 121x72x34MM. Weight: 200g. Physical bridge: RS485 command. Communication rate: 300bps ~ 460800bps baudrate rate (adaptive). Supports points; each RS485 bridge supports up to 32 junctions. Communication distance: 1200m (9600bps), the increased the communication rate, the shorter the distance. Supply potential: constant current 7V ~ 36V. Operating temperature: -45℃ ~ +85℃. environmental humidity: < 95% relative humidity. Transmission intermediate: Normal parallel wire/twisted pair wire. Package Includes: 1 RS485 HUB 4P,1 power adapter,1 screwdriver. note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.