The Siemens Pure binax 5bx has ip rating (liquid), ip rating (solid), disposable batteries, telecoil, push button, volume control, rechargeable batteries, directionality, adjustment synchronization, tinnitus relief, and frequency lowering Pure binax™ is ready to delight even the most discerning wearer: Equipped with binax, the next generation of BestSound™ Technology, it offers all the outstanding advantages of a binaural hearing instrument. Thanks to e2e wireless™ 3.0 this can be done whenever needed because it includes the industry’s lowest energy consumption**. Plus, two independent clinical studies have proven that the new Pure binax allows wearers to understand speech in difficult listening situations such as restaurants or parties even better than people with normal hearing.* Paired with the new easyTek™ and easyTek App, these models satisfy even the most tech-savvy hearing aid wearers.