Retention 4.0 S is a hearing aid accessory used with receiver-based fittings. It is designed to position a dome in the outer ear.
Color: transparent. Length: approx. 35 mm. Diameter: 3 Ă— 4 mm.
Compatibility: Phonak, Unitron and Hansaton hearing aids using receiver 4.0 S, receiver 5 S, or receiver 6.0 S.
Included: 10 Ă— Retention 4.0 S.


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