Brand new, high quality Features: Industrial-grade protection: TVS transient suppression, ESD electrostatic protection, surge protection, A & B signal line short circuit protection, and power supply short circuit protection (no burning on short circuit). Transmission distance up to 1200 meters (tested at 9600bps). Supports baud rates up to 921600, significantly higher than 115200, enabling faster data transfer. Multi-system support for hot-swapping: compatible with Win98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA/LINUX/MAC OS X. USB interface is hot-swappable. Automatically identifies and controls data transmission direction without handshake signals (RTS, DTR, etc.). Mode conversion is achieved without jumper settings, ensuring compatibility with existing communication software and interface hardware. Features TXD and RXD indicators. Line converter only; other accessories shown in the picture are not included. Specifications: Power supply: USB 5V Transmission distance: Up to 1200 meters (9600bps) Chip solution: CH340 Communication protocol: Pure hardware device, not subject to protocol limitations Baud rate: Up to 921600bps, supports mutual transmission for higher baud rates Protection: TVS transient suppression, ESD electrostatic protection, surge protection, AB signal line short circuit protection, and power supply short circuit protection (no burning on short circuit) Temperature range: -40°C - 80°C Provides external 5V power supply with fuse current limiting Supported systems: Supports hot-swapping, compatible with Win98/CE/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA/LINUX/MAC OS X. USB interface is hot-swappable. Automatically determines and controls data transmission direction without handshake signals (RTS, DTR, etc.). Mode conversion is achieved without jumper settings, ensuring compatibility with existing communication software and interface hardware. Size: Approximately 70x27x13mm / 2.76x1.06x0.51in Item type: Line Converter Material: PVC + Fiberglass sheet Quantity: 1 piece Note: Transition: 1cm=10mm=0.39inch. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Line Converter