Uniden APCO25 Owner's Manual page 62

During transfer both scanners display the following.
When transfer is complete, the scanners display COMPLETE. Turn both scanners off and
then back on to initialize them.
If data transfer is not successful, the following message appears.
To clear the error, press . To exit the clone mode, repeatedly press MENU.
.
56
CLONE
== >
MASTER UNIT
CLONE
== <
SLAVE UNIT
CLONE
ERROR
MASTER UNIT