The Hearing aid by Elipse is Designed specifically for people who want maximum amplification . This hearing aid illustrates major advantages such as Up to 685 hours of battery life , Easy-to-operate volume control , Feedback reduction , which minimizes the risk of disturbing sounds , Noise reduction, for unwanted background noise,3 comfort programs with push button control and audible signal tones , Direct Audio Input (DAI) for compatibility with FM systems , Telecoil for better hearing with telephone and assisting listening devices , Programmable Telecoil , Super power with up to 86 dB gain and 145 dB* output .