The IP test is a third-party standardized protocol used to demonstrate the durability of a hearing instrument when exposed to dust and water. All our Era platform BTE and RIC products have undergone and passed this rigorous IP testing. Moxi² Dura and Quantum² S are rated IP67 All other Unitron Era platform BTEs are rated IP57 These ratings give your patients the peace of mind that their Unitron hearing instruments will continue to perform as expected even when exposed to harsh elements. It is important to note that IP57 denotes water resistant - not waterproof. Hearing instruments should never be worn in the shower or swimming, however, this rating means that an accidental drop into the sink, getting caught in a rainstorm, or stepping into the shower for a moment with them on will not be detrimental to performance once the devices are thoroughly dried out.