, high quality Features: All original chips are used! Industrial protection: TVS transient suppression, electrostatic ESD protection, surge protection, short circuit protection between A and B signal lines and power supply (short circuit without damage) Transmission distance up to 1200 meters (tested at 9600bps) Supports baud rate up to 921600, higher than standard 115200, enabling faster paired transmission Multi-system support with hot swap capability; compatible with Windows 98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA/LINUX/MAC OS X; USB interface supports hot swapping Automatically identifies and controls data transmission direction without handshake signals (such as RTS, DTR, etc.); mode conversion without jumper settings, ensuring compatibility with existing communication software and hardware Equipped with TXD and RXD indicators Line converter only; other accessories shown in the picture are 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, supports high-speed bidirectional transmission 6. Protection: TVS transient suppression, ESD protection, surge protection, short circuit protection on A/B signal lines and power supply (non-destructive under short circuit) 7. Operating temperature range: -40°C to 80°C 8. Provides external 5V power supply with fuse current limiting 9. System support: hot swap supported; compatible with Windows 98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA/LINUX/MAC OS X; USB interface supports hot swap 10. Automatic data transmission direction control without handshake signals (e.g., RTS, DTR); no jumper required for mode switching; ensures compatibility with existing communication software and hardware 11. Dimensions: approximately 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: 1cm = 10mm = 0.39inch Please allow 0-1cm 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