Sonos CR100 Guide D'installation page 13

Sonos Controller Setup Guide
low, the Battery Status Indicator will light red. To extend the battery life, it's best not to
let the battery discharge completely before recharging.
Resetting Your Controller
If your Controller's screen should freeze, press and hold the Mute
buttons simultaneously on the Controller for approximately 3 seconds. The Controller
will reset itself momentarily.
If you want to join your Controller to a different Sonos Digital Music System, you must
first factory reset your Controller. Select System Settings→Controller
Settings→Advanced Settings→Factory Reset from the Music menu.
Caution: Household cleaners or solvents can damage the finish on your ZonePlayers
or Controllers. Clean only with a dry soft cloth.
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and Music