In-the-Canal (ITC) hearing aids are small enough to fit almost entirely in your ear canal. The style fills a small portion of the concha. It provides adequate amplification for mild to moderate hearing losses. Depending on the size of the ear, it may or may not be able to accommodate some of the options available with advanced technology, or permit the venting needed for users with good low-frequency hearing. This style offers an attractive cosmetic solution with a slightly larger battery.