Cons:
- Requires 3.3V for power and data lines (not tolerant to 5V !!!! careful)
- Product with no certification (FCC or other)
- Relatively limited communication range (not more than 5m for my case in open space)
- During the driver installation, 2 COM Port apparaise (COM9 and COM10 home) the first being the serial port to use, the second does not react and can cause a crash of the PC application using the port if no Timeout Set for data sent)