, high quality Features: All original chips are used. Industrial protection: TVS transient suppression protection, electrostatic ESD protection, surge protection, short circuit protection on A and B signal lines, and short circuit protection with power supply (will not burn when shorted). Transmission distance up to 1200 meters (tested at 9600bps). Supports baud rate up to 921600, higher than standard 115200, enabling faster paired data transmission. Multi-system support with hot swap capability; compatible with Windows 98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA, Linux, and MAC OS X systems; USB interface supports hot swapping. Automatically identifies and controls data transmission direction without requiring handshake signals (such as RTS, DTR, etc.). Mode conversion is possible without jumper settings, ensuring compatibility with existing communication software and hardware interfaces. Equipped with TXD and RXD indicators. This package includes the line converter only; other accessories shown in pictures are for demonstration purposes and not included. Specifications: 1. Power supply: USB 5V 2. Transmission distance: up to 1200 meters (at 9600bps) 3. Chip solution: CH340 4. Communication protocol: Pure hardware device, independent of protocol 5. Baud rate: Up to 921600bps, supporting high-speed bidirectional transmission 6. Protection features: TVS transient suppression, electrostatic ESD protection, surge protection, short-circuit protection on A and B signal lines, and power supply short-circuit protection (will not burn when shorted) 7. Operating temperature range: -40C to 80C 8. Provides external 5V power supply with fuse current limiting 9. System compatibility: Supports hot swap; compatible with Windows 98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA, Linux, and MAC OS X; USB interface supports hot swapping 10. Automatically determines and controls data transmission direction without handshake signals (e.g., RTS, DTR); mode conversion without jumpers ensures compatibility with existing communication software and hardware 11. Dimensions: Approx. 70 x 27 x 13mm / 2.76 x 1.06 x 0.51in 12. Item type: Line Converter 13. Material: PVC + Glass Fiber Sheet 14. Quantity: 1 piece Note: Transition: 1cm = 10mm = 0.39inch. Please allow 01cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not reflect the actual color of the item. Thank you. Package Includes: 1 x Line Converter