Hands free Bluetooth device that can be personalized to meet the most demanding listening needs. Operates in Multiple Modes for listening amplification on the phone or off. For the person who spends a lot of time on the phone and doesn’t want to lose hearing capability when not on the phone, or someone with a hearing loss who needs to remove their hearing aid to use a Bluetooth earset. Environmental Listening Mode “Auto focus” for your ears. Amplifies the sound around you when you’re not on the phone. NoiseNavigation™ uses advanced circuitry to create exceptional speech understanding, sound quality, and comfort. Automatically switches to Phone Mode when a call is received. One2One Mode enables two-way Bluetooth communication between two SM100 EarModules Phone Mode seamlessly switches between Environmental Listening Mode and One2One Mode Personal Sound - Three user selectable configurations - normal, moderate and strong sound enhancement - increase clarity without raising volume. Eartips come in three sizes for best fit, or use a custom-molded eartip (see your hearing professional) for greatest comfort and gain. Uses rechargeable battery (battery, USB/AC charger and car charger included). Seven hours talk time, 72 hours standby, 24 hours in Environmental Mode. One year warranty.