Lutron Electronics DM-9961 Manual page 2

Caution Symbol
Environment Conditions
* Installation Categories III-1000V.
* Pollution Degree 2.
* Altitude up to 2000 meters.
* Indoor use.
* Relative humidity 80% max.
Caution :
* Risk of electric shock !
Caution :
* Do not apply the overload
voltage, current to the input
terminal !
* Remove test leads before open
the battery cover !
* Cleaning - Only use the dry
cloth to clean the plastic case !