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The Harmony is a behind-the-ear (BTE) device with a BTE speechprocessor, a battery-compartment and a coil with magnet. Available in 3 colours (click here for colour palette).
The battery-compartment consists of 1 large (Powercel Plus) or 1 small (Powercel Slim) rechargeable battery with a working autonomy of 21 hours, resp. 12 hours.
Alternatively, the battery compartment can be replaced by a connector with a body-worn battery box for one AA battery("powerpak").