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 8 TTL serial ports, with 5V 3V3 voltage expansion pad positions. Driver: High speed communication VCP driver Flow control: None indicator light: Power light: blue Send indicator light: red Receiving indicator light: green Color: Material: PCBandPlastic 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 USB to 8 Ways TTL Serial 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.