The Phonak FM systems are versatile and durable systems that can be used with a wide variety of hearing aids and cochlear Implants. Please call or email to obtain pricing and fitting information for your particular application. The manufacturer's name, model number, and serial numbers of your hearing aids or cochlear implant processors are needed to determine compatibility and to determine what is needed to interface the FM receiver with your particular hearing aid or cochlear implant processor. An Audiologist will often be needed to fit the Phonak ear level FM systems because their functionality may be dependant on issues such as the internally programmed settings in your hearing aid.