The MHA100 was developed in conjunction with Plantronics' Clarity division and uses their signature amplifying technology, Clarity® Power™. When sound activity is detected, the MAH100 activates automatically, amplifying both volume and clarity. The Clarity Power technology shapes incoming high frequencies -- the sounds that are most commonly missed by people with mild to moderate hearing loss -- amplifying conversations to a comfortable volume with distinct, crisp tones. The MHA100 is also ideal for mobile professionals who often hold conversations in noisy environments such as an airport or a busy street.

MHA100 works with most mobile and cordless phones with a standard 2.5mm jack, and can amplify incoming sound up to 24db, or about three times normal volume.

It has a discreet, lightweight design that makes it easy to wear on a belt, and includes an on/off LED indicator light and easily accessible volume controls.