Acoustic Wave device Novafon SK2

I own this product since about 5 years and I am very pleased that I have made the current purchase, is that I have purchased the product for my daughter, meanwhile, it will make a speech therapist on their own. So as a practical initiation.

I can recommend this device, has it really necessary from an honest conviction. But please handle it carefully because it can be much worse. Let a doctor or therapist advice before purchasing this device.