It seems you're looking for the for the WLN KD-C1 (a popular low-cost Chinese handheld radio, also known as the KD-C1 or KD-C2 under the WLN brand).

Most budget programming cables use one of two main chipsets: Very common in modern, affordable cables.

// Implement the new feature logic here printk(KERN_INFO "WLN KD-C1 new feature activated\n"); return 0;

: Found in many cables. Note that newer Prolific drivers often block "counterfeit" or knock-off chips, sometimes requiring an older driver version to work.

Sites like RT Systems provide proprietary cables and drivers that are guaranteed to work without manual driver hunting. Step-by-Step Installation Guide