Logitech Z407 Bluetooth Computer Speakers with Subwoofer and Wireless Control Dial - Manual (Page 9)

8 sec.
RESET ALL SETTINGS
Long press the Bluetooth ® button and the wired
input button at the same time for 8 sec to reset
the system
The LED will start to fast blink twice and then
you will hear a reset tone The LED will turn
to solid blue after you successfully reset the speaker
system
Reset tone
9 English