Phonak/ Unitron/ HANSATON Hearing Aid RIC SDS 5.0 Receiver/ Speaker

Phonak & Unitron. How do I identify which Phonak / Unitron RIC receiver wire I. A Phonak / Unitron SDS 5.0 RIC. no audiological difference between the SDS 4.0 & SDS 5.0 and. The SDS 5.0 RIC Receiver Wires, which use Cerustop wax guards.