You can download and review the manual for the
Icom IC-H16/U16/U2 HT here. This radio is an Amateur Radio Service transceiver, and
will require an FCC license to transmit. No license is required to monitor or listen to the radio. Keep in mind,
the Amateur Radio Service is NOT part of "CB" or "FRS" radio services - neither of which require a license to transmit.
When you read the manual, you'll quickly see that there is no "reset" function available. There are only 16 memory locations, so you can simply lock out channels you no longer wish to monitor or you may program any valid frequency in the range supported by the radio. Doing this, in combination with setting the squelch or tone will prevent the radio from opening a particular frequency(s) when the corresponding memory location is scanned.
I hope this helps and good luck.
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