This module is an isolated USB-TTL converter featuring a standard TYPE-C interface. Connect to a computer using a TYPE-C data cable. Equipped with a dedicated signal isolation chip for stable output. Includes power indicator for clear status monitoring. USB power supply: 5V via TYPE-C interface TTL terminal power supply: 3.3V with power indicator TTL signal level: 3.3V (supports only 3.3V power and signal, not 5V) Communication protocol: Pure hardware design, protocol independent Baud rate: Up to 25600bps Isolation level: Power and signal isolation, isolation voltage AC3000Vrms, static ±8KV Operating temperature range: -40°C to 80°C System compatibility: Supports hot swap; compatible with Windows 98/2000/2003/2008/XP/WIN7/WIN8/WIN10/VISTA, Linux, and macOS systems; USB interface is hot-swappable Product dimensions: 23mm x 23mm x 7mm Pinout: 3.3V: 3.3V power input (this pin requires external power supply to operate the module; power indicator must be lit for proper function) RX: UART serial input TX: UART serial output GND: Ground TYPE-C: USB connection to computer Note: The 3.3V pin on the TTL side is for power input to the module, not a voltage output. The power indicator must be illuminated for the module to function. Color: Black Material: PCB and electronic components Package contents: 1 x USB to TTL module with adapter board 1 x 4-pin cable 2 x M3 x 5mm screws 2 x M3 nuts (Cables, screws, and nuts may vary in color as they are supplied in random colors; specific colors cannot be requested) The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual product. Measurement tolerance: ±1–3cm.