Features: USB power supply, no need for external power supply; Compatible with USB 1.0/1.1/2.0, RS-422, and RS-485 standards; Converts USB signals and protocol frames into balanced differential RS-422 or RS-485 signals and UART protocol; Acts as a bridge device to connect USB networks to RS-422/RS-485 networks; Provides per-line surge protection and 600W lightning protection; Utilizes TVS and thermistor dual protection technology to resist lightning strikes and surge voltages while maintaining low interelectrode capacitance for high-speed transmission; Features internal no-delay automatic transmit/receive switching; Unique I/O circuit automatically controls data flow direction without handshake signals (e.g., RTS, DTR) or jumper settings; Supports full-duplex (RS-422) and half-duplex (RS-485) modes; Plug-and-play design ensures compatibility with existing communication software and hardware; Supports point-to-point and point-to-multipoint communication; Allows connection of up to 32 RS-422 or RS-485 devices; Data communication rates from 300 to 128,000 bps; Includes power and data flow indicator lights for status monitoring; Supports USB to RS-422 and USB to RS-485 conversion; Compact and lightweight design for easy portability. Specifications: Material: ABS; Color: Black, White (optional); Size: approx. 11 x 7 x 1 cm / 4.33 x 2.76 x 0.39 inch The RS-485/RS-422 terminals support the following networking modes: 1. Point-to-point four-wire full-duplex (RS-422) 2. Point-to-multipoint four-wire full-duplex (RS-422) 3. Point-to-point two-wire half-duplex (RS-485) 4. Point-to-multipoint two-wire half-duplex (RS-485) For proper operation in full-duplex or half-duplex configurations, a termination resistor (120 ohm, 1/4W) is recommended at the end of the line to prevent signal reflection and interference. Package List: 1 x Converter, 1 x CD