Siemens Lotus 12 SP Analog Hearing Aid is designed for severe to profound hearing losses. It is a combination of the latest trimmer technology with latest digital hearing features. For the wearer it means superior sound quality with comfortable hearing. It is a fully digital signal processing hearing instrument. The device has a robust design and is moisture-proof. Therefore, no matter how humid the environment is, moisture content will not percolate into the device. The rocker volume control allows the wearer to adjust the volume settings. It can be set high when outdoors and low when indoors.