+ "\t-f <freq>\tAdd frequency in Hz to detect (use multiple times, default 440 Hz)\n"
+ "\n"
+ "\t-n <format>\tSet number output format\n"
+ "\t\tf: float\t23.4223 (default)\n"
+ "\t\ti: integer\t23\n"
+ "\t\tb: binary\t(0|1)\n"
+ "\t\tB: Boolean\t(false|true)\n"
+ "\n"
+ "\t-t <treshold>\tSet treshold (used in filter, see -l) (defaults -1)\n"
+ "\t-l <filter>\tSet line filter\n"
+ "\t\tf: Falldown:\tprint only when over treshold or just crossed (default)\n"
+ "\t\tt: Treshold:\tprint only when over treshold\n"
+ "\t\tc: Crossed:\tprint only when treshold crossed\n"
+ "\t-u\t\tInvert\ttreshold (values under treshold will be displayed)\n"