We must however remember not to sound too loud (yes, one of its major advantages. !! Adjust the volume and turn it off when it is no longer necessary because it is heavy on 3 LR03 batteries j .. 'chose a good charger (it is always useful and put my last 19h to charge 4 batteries), rechargeable batteries that hold water (2 or 3 packs of 4 in this way no waiting) and a small turning Phillips screw always at hand;)
I bought the same as she did with her nanny ...