Personal Radio Service (PRS) for two-way communication withother compatible radio devices.When communicating with other Garmin®Rino devices,additional features are available.TransmittingTo communicate with other Rino and GMRS or UHF CBRS/PRSradio users, you must be on the same channel and code(Channels and Codes, page 2).1 Hold PTT.2 Speak into the front of the device.3 After you are finished speaking, release PTT.After you release PTT, the radio transmits your positioninformation, and you cannot hear incoming transmissionsuntil your transmission is complete . A roger tone sounds onyour radio and on the radios receiving your transmission toconfirm that the transmission is complete.NOTE: You can change or disable the roger tone (Setting theDevice Tones, page 8).The Radio AppUsing the radio app, you can view information about the radio,control the radio channel and squelch codes, and customize theradio features.Icons along the top of the radio page provide useful informationabout the radio.: Indicates the activity status of the radio. When an arrow ispointing at the radio, the radio is receiving a transmission.When an arrow is pointing away from the radio, the radio istransmitting.: The radio is ready to transmit position information (Peer-to-Peer Positioning, page 3).: The radio is muted (Adjusting the Radio Volume, page 2).Opening the Radio AppYou can manage your channel, code, and other radio settings inthe radio app.From the home screen, select Radio.Adjusting the Radio Volume1 Select .The volume screen appears.2 Use the Thumb Stick controller to select and adjust theVolume.Adjusting the Squelch LevelYou can adjust the sensitivity level of the squelch to filter outbackground noise. When you adjust the squelch level higher,fewer weak background signals are heard.1 When you hear unwanted background noise, select .The volume screen appears.2 Use the Thumb Stick controller to select and adjust the sliderbar.You should increase the squelch level until you no longerhear the unwanted background noise.Channels and CodesTo communicate with other Rino and GMRS or UHF CBRS/PRSradio users, you must be on the same channel.Rino devices are compatible with third-party GMRS or UHFCBRS/PRS radios as long as the radios use standard GMRS orCBRS/PRS frequencies. A list of all frequencies used by thisdevice is available in the product specifications (RadioFrequency Charts, page 11).NOTE: GMRS frequencies are regulated by the FCC in theUnited States. To transmit on GMRS frequencies, you mustobtain a license from the FCC (FCC Licensing Information,page 12).US and Canada Channel Number Channel Type1 through 7 and 15 through 22 GMRS channels15R through 22R Repeater channelsAustralia and New Zealand ChannelNumberChannel Type9 through 40, 39, 40, 49 through 60, 64through 70, 79, 80UHF CBRS/PRS channels1R through 8R (31 through 38), 41Rthrough 48R (71 through 78)CBRS/PRS repeaterchannels*5 and 35 Reserved channels(emergency)22 and 23 Reserved channels (dataonly)61 through 63 Reserved channels (for futureuse)*Communication with another CB station is not authorized withinoperational range of a CB repeaterSquelch codes allow you to filter calls from other users on thesame channel, so you hear only the radios you want to hear.The device has two different squelch modes, Continuous ToneControlled Squelch System (CTCSS) and Digital-Coded Squelch(DCS). Calls on the channel that are not using the same squelchcode in the same squelch mode are ignored.NOTE: Squelch codes do not make your conversation private.Anyone on the same channel can hear your conversation.Squelch ToneModeSquelch CodesCTCSS 1 through 38DCS Listed in the product specifications (RadioFrequency Charts, page 11)Selecting a Channel1 From the radio app, select Channel.2 Select a channel from the list.Selecting a Squelch Code1 From the radio app, select Code.2 Select a code from the list.NOTE: Selecting Off allows you to hear everything on thechannel.NOTE: If you cannot hear calls on the same channel with thesame code, verify all the radios are using the same squelch tonemode (Changing the Squelch Tone Mode, page 2).Changing the Squelch Tone ModeThis device can use two types of squelch tone modes, CTCSSand DCS. If you cannot hear calls on the same channel with thesame code, make sure all the radios are using the same squelchtone mode.1 From the radio app, select > Setup Radio > SquelchTone Mode.2 Select a squelch tone mode.Monitoring a Channel for ActivityYou can monitor a single channel for any activity, including staticand weak voice signals. This is helpful if a signal is going out ofrange.1 From the radio app, select the channel you want to monitor.2 Select Monitor.2 Radio