PNI P15UV Benutzerhandbuch Seite 39

This function is useful when the radio operates through a repeater. When the PTT key is released,
the repeater will emit the final transmission tone to confirm that it is working.
Options:
Off, 1,2,3,4,5,....10 (to set the delay time)
Note: Disable this function if you use the radio without a repeater.
35. Delay the squelch tail of repeater (RPT-RL)
Keys shortcut [MENU] [35]
With this function you have confirmation that the repeater has transferred the signal.
Options:
Off, 1,2,3,4,5,....10 (to set the delay)
36. Roger Beep (ROGER)
Keys shortcut [MENU] [36]
When you release the PTT key, the radio will beep to confirm to other users that you have
completed the transmission and can speak.
39 User manual