Product Features: The hearing amplifier is particularly discreet. It is barely visible due to the ergonomic fit behind the ear. The rendering is low noise. The volume of noises indoors and outdoors is amplified and therefore aids people with restricted hearing ability. Very discreet Extended frequency range Individual adjustment to the ear canal Ideal for restricted hearing ability Ergonomic fit behind the ear, barely visible Amplifies the volume of all sounds indoors and outdoors Low-noise rendering 3 attachments to individually adjust to the ear canal Frequency range: 100 to 6000 Hz Amplification: max. 40 dB Volume: max. 128 dB Medical device Warranty: 12 months