Petsafe ULTRALIGHT SONIC BARK CONTROL Guide D'utilisation page 5

STEP 5 OBSERVE FIRST REACTION
Observe your dog's first reaction to the correction. As excited as your dog
may get, you must remain calm. Yelping or cowering is a normal response.
Your pet must clearly understand the reason for the stimulation in order
to change his behavior. Modifying your dog's barking behavior may take
several days.
Each dog will need different lengths of time to learn to control their
nuisance barking.
CAUTIONS: To prevent damage to the inner ear, do not place the unit next to
your ear, the ear of any other human, or your pet's ear. Keep out of the reach of
children. Do not allow dog to chew on unit.Unit is not waterproof - do not immerse
in water. If unit gets wet, you may remove battery, shake out excess water, and let
unit dry before attempting to use again.
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