The same, advanced, 100%–digital technology and quality found in medical hearing aids help you hear much better, in the field or anywhere else, and protect your ears from shotgun blasts–all at half the price of medical hearing aids. Plus, an ergonomic ear-canal design leaves them virtually invisible. Both Standard and Ultimate models give identical protection and instantly cut off sounds above 93dB–with shotgun blasts ranging at about 130–140dB. Both are great for hunting and the sporting clays field. The Ultimate model, however, gives you even greater feedback cancellation and background noise cutoff, and better overall volume, directional, and clarity capability. It's the model of choice if you suffer from a hearing loss. Complete instructions included.