Tecsun PL-660 Operation Manual page 7

13. Single Side Band (SSB) indicator
USB: Upper Side Band
LSB: Lower Side Band
14. Tuning Speed:
Slow: Slow Tuning
Fast: Fast Tuning
KHz: frequency unit for MW, LW & SW
MHz: frequency unit for FM
15. AM Band width indicator
: AM Wide band
: AM Narrow band
16. FM, MW, LW and SW Band indicator
17. FM Stereo indicator
18. Air Band indicator
19. NiMH Rechargeable Battery indicator
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