When working with Weierwei Vev-3288s programming software, keep in mind:

This is almost always caused by an incorrect or outdated USB cable driver. Open Windows Device Manager. If you see a yellow triangle next to your COM port, right-click it, select "Update Driver," and manually select an older, compatible driver version.

Continuous Tone-Coded Squelch System / Digital Coded Squelch for receiving.

Turn the radio on and set the volume knob to roughly 60-70%.

Which is your computer running? (e.g., Windows 10, Windows 11, Mac)

Absolutely. Without the programming software, the Weierwei Vev-3288s is limited to the 16 pre-programmed (and often illegal) frequencies a factory worker input in China. With the software, it becomes a versatile tool capable of interoperating with MURS, GMRS, marine bands, and commercial business bands (where legally permitted).