Battery size is typically larger in these units resulting in longer battery life. Maximum amplification can be derived from this style while cost is typically lowest of all styles. A telephone switch is standard. They are custom made and may utilize a telephone switch or directional microphones if necessary to benefit the user. These instruments offer good value for cost and provide the highest amplification of the in the ear series.
Smaller batteries mean shorter battery life.
Cosmetic appeal of canal hearing instruments is very good and they are quickly becoming the most popular of hearing instruments. Cosmetics is a big plus for these instruments. Cost is typically greater than for all other instruments. They are available to help with most any situation and are typically less expensive than hearing instruments. All manner of accessories are available for hearing instrument care and cleaning as well as maintenance of good ear canal health.