[未知用户] The options I have available are:
- A knob, long-lasting (analog) radio: Tecsun R-1012 (a more classic option in this category is the R-909)
- Two buttons for automatic selection: Eton Mini
Other options, such as the PL-660 and PL-368, are more powerful but don't perfectly match the requirements described above. Ultimately, it's important to carefully consider what you actually need. Are you looking for a sending device, an audio device, or a machine?