Features: This hub uses industrial-grade super anti-interference chips with surge and electrostatic protection circuits Load capacity: each channel supports up to 128 devices; supports 152.2Kbps high baud rate Two-way communication, plug and play, no driver required, easy to use Good heat dissipation and stable performance Widely used in industrial systems, communication, transportation, education, finance, electricity, security, and charging systems Specifications: Item: Industrial Isolated 1 to 8 RS485 HUB Model: TX1178 Terminal type: 2-position terminal block Size: approx 115x80x30mm / 4.53x3.15x1.18in Transmission distance: 1200M Load capacity: each channel supports up to 128 devices Transmission medium: shielded wire or twisted pair Working environment: -20C to 80C Power supply: DC 12-55V Note: Due to lighting effects and shooting angles, there may be slight color variations in the product. Please understand. Please allow 0-3mm error due to manual measurement. Package includes: 1 x 1 to 8 RS485 HUB