The Sonnet is a behind-the-ear (BTE) device with a BTE processor, a battery-compartment and a coil with magnet. Available in 14 colours (click here for colour palette).
The battery-compartment contains 1 rechargeable batterie or 2 disposable batteries (675 Extra of 675 C)
The remote control allows you to change some of the settings.
The WaterWear is a single-use plastic enclosure that completely seals in your processing unit, cable and coil. It is designed for use with rechargeable batteries only. Follow the instructions carefully. Contains 3 pouches (which can be used 3 times each) and 9 seals.