Hear-N-Now 

The aids are molded to fit inside your ear canal and can improve mild to moderate hearing loss in adults. Though these hearing aids are the smallest and least visible of the available styles, the small style can be a disadvantage. Completely-in-the-canal aids have little space for add-ons, such as volume controls and directional microphones. They're generally more expensive than other styles. And the batteries are smaller, so battery life may be shorter. One advantage to the small size: The ear helps protect the instrument from wind noise, although it doesn't eliminate this problem. Make sure your hearing specialist knows about your lifestyle and where you want to hear better so that he or she can advise you accordingly.

An in-the-canal hearing aid fits partly in the ear canal, but not as deeply as the completely-in-the-canal aid. In-the-canal aids can accommodate mild to moderately severe hearing loss in adults. This style may contain features that won't fit on completely-in-the-canal aids, yet still be cosmetically appealing.

An in-the-ear style of hearing aid fills most of the bowl-shaped area of your outer ear. This style is helpful for people with mild to severe hearing loss. In-the-ear aids are more visible to others and may be more vulnerable to picking up wind noise. But sometimes the larger size makes in-the-ear aids easier to adjust and insert. The bigger batteries in these hearing aids are likely to last longer than those in the smallest aids.

Behind-the-ear hearing aids include a component that rests behind your ear. This component conducts sound to an ear mold that fits inside your ear canal. This type of aid is appropriate for almost all types of hearing loss and for people of all ages. Behind-the-ear aids are the largest, most visible type of hearing aid, though some new versions are smaller, streamlined and barely visible. Behind-the-ear hearing aids can be the most powerful and often are the easiest type to adjust.

These are very small behind--the-ear-style devices. Sound travels from the instrument through a small tube or wire to a tiny dome or speaker in the ear canal. These aids leave the ear open, so they are best for mild to moderate high-frequency losses where low-frequency hearing is still normal.They appeal to people who want an instrument that is less visible but doesn't plug up the ear like the small in-canal models do.