Parameters: Type: Communication Conversion Communication speed.: Support commonly used baud rates Interface: Supports C to C Supported system: Linux for mac0S Features: Compact and high-speed Type-C interface with 4 TTL serial ports, with 5V 3V3 voltage expansion pad positions. Driver: High speed communication VCP driver Flow control: With DTR flow control pins not soldered indicator light: Power light: blue Send indicator light: red Receiving indicator light: green Color: Material: PCB+Plastic There are differences in printing and silk-screen printing due to different batches, which not affect the use; there are color differences in the actual product due to different light or display. Package Contents: 1 x module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.