Baofeng UV-2501 User Manual page 17

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45. [F Key] + [4] + [5] : STE - Squelch Tail Elimination at the end of a received signal.
Requires both radios to have the option ON.
46. [F Key] + [4] + [6] : RP-STE - Repeater STE requires a repeater with this function ON.
47. [F Key] + [4] + [7] : RPT-DL - RP-STE Delay time.
48. [F Key] + [4] + [8] : RESET – VFO or ALL
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