Silvercrest SPMR1 B1 Operation And Safety Notes page 23

The two monitoored channels are shown alternately in the display. If
the second monitoored channel is diplayed "2CH" also appears in the
display.
Call alert (CA) tones
The call tone is an audible signal that alerts other stations that you want
to transmit a message. This product has 20 different call tones.
Selecting the call tone:
Step 1: Press the Menu button 6 3 times. The indication "CA" will
appear on the display 1 and the number of the current call tone will
flash and the call tone can be heard.
Step 2: Press the Up button 5 or the Down button 8 to set a different
call tone.
Step 3: Press the PTT button 14 to confirm the selected call alert tones.
You can use the function by pressing the Call button 13 . The call tone is
then sent.
NOTE: "0" = Tone OFF
Roger Beep ON/OFF
If this function is enabled, a signal tone will sound at the receiving end as
soon as you stop transmitting. The receiving person now knows when he
or she can talk back.
Step 1: Make sure that the handheld transceiver is switched OFF.
Step 2: Press and hold the Up button 5 and depress the button 13 for
3 seconds to switch ON the handheld transceiver.
Step 3: If the Roger beep was enabled, it will now be disabled, and vice
versa.
Button sound ON/OFF
Key tones are the tones that sound upon pressing a button. You may
switch these tones on or off as follows:
Step 1: Make sure that the handheld transceiver is switched OFF.
Step 2: Press and hold the Down button 8 and depress the button 13
for 3 seconds to switch on the handheld transceiver.
24 GB/IE/NI