When you do not use the Vibravoice, put the switch (7) on the position O and plug it with the adaptator to load the internal battery. Thus, the Vibravoice is always at your disposal when you need it and it offers an autonomy of about 8 at 10 hours, depending on the intensity level.

Keep out of humidity, of water, liquid, dust and dirt. 

The vibro sensitive plate being a very sensitive device, only use the Vibravoice gently with clean hands.