Product Description:

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4-channel TTL serial port can be independently communicated out 4 XH-4 seat TTL level, can use the matching cable external.

Using mainstream TYPE-C interface This interface with USB cable is convenient, most cell phone cable can be used.   It must be noted that only the charging function of the line can not be used

With LED indicators 4-way TTL RXD, TXD have LED indicators

On-board 3.3V power supply chip Use 1117-3.3 SOT89 package chip, can output 400MA

Support 4-way serial high speed communication 4-way independent USB-TTL serial