Using a low-energy Bluetooth signal, the devices allow users to adjust the left and right volumes and the bass and treble using an app on their smart phones (ReSound Smart for the LiNX2 and TruLink for the Halo). Users can also stream music and video sound from their phones directly to the device. They can use their phones to better “target” the area they’re trying to hear and store settings for specific locations that can be automatically recalled using the phone’s GPS system.
Both are compatible with iPhone and iPad, as well as Android products, but music and video sound cannot be streamed directly to the hearing aid on Android smartphones due to differences between Apple and Android technology. They also both work with the Apple Watch, but only to use certain key features.
TruLink includes a feature called SoundSpace that allows users to more easily make adjustments to combinations of loudness, softness, bass, and treble by sliding a fingertip across a field, rather than adjusting each setting individually. Halo also includes a car mode that senses when a user is traveling faster than 10 mph and switches to settings that allow for easier listening in the difficult environment of an automobile.