Motorola RMU2040 Quick Reference page 98

RM SERIES
Factory Settings Reset
To reset radio to
Factory default
settings, Power up
with SB1, SB2 &
PTT pressed at the
same time.
Please note that all
channels will revert to
default frequencies.
On/Off
Volume Knob
PTT (Push-to-Talk)
Button
SB1 – Monitor Button
SB2 – Channel Select