Function:

1. Integrated interface, sound card serial port two-in-one
2. Support TTL/232
3. Support USB serial port PTT control
4. Small size: 50 x 25 x 15 mm (2" x 1" x 0.6")
5. Dual 3.5mm plug 4PIN function definition, flexible connection to different devices
6. Support 3.3v voltage output (such as LAB599 TX-500)
7. Reserve spare function expansion port(Audio jack definition, audio input and output, PTT control (USB serial port control, non-audio)Serial port jack definition, input and output (default TTL, can be changed to 232), 3.3V output (default closed) Pin definition and configuration definition are marked on the back of the board)

You can use this USB sound card to operate commonly used digital modes such as WSJT-X, flDigi and so on.