M Sensor Retention – Extra Support for Phonak and Unitron Receivers
M Sensor Retention, also known as Sensor Lock, helps keep compatible Phonak and Unitron M Sensor receivers securely positioned in your ear. The flexible support arm provides additional stability if your receiver tends to work loose during everyday activities.
The retention attaches directly to the receiver and rests in the bowl of your outer ear, also called the concha. It acts as a discreet anchor, helping to keep the receiver and dome in position.
Features
- Additional support for compatible Phonak and Unitron M Sensor receivers
- Helps reduce movement and slipping during everyday activities
- Flexible, lightweight and discreet design
- Attaches directly to the receiver
Compatibility
Suitable for compatible Phonak and Unitron M Sensor receivers. Compatibility depends on the receiver type, rather than the hearing aid brand alone.
If you are unsure which retention you need, contact us with your hearing aid model or a clear photo of your receiver.
Package contents
- 10 M Sensor Retention pieces
- Product code: 004-4516-001
Receivers, domes and hearing aids are not included.
Frequently asked questions
Select a question below to see the answer.
What does the M Sensor Retention do?
The M Sensor Retention helps keep your receiver and dome securely positioned in your ear. Its flexible arm rests in the bowl of your outer ear, providing additional support and helping to reduce slipping during everyday activities.
Which receivers is the M Sensor Retention compatible with?
This retention fits compatible Phonak and Unitron M Sensor receivers. It is not a universal retention for all Phonak or Unitron receivers. Check your receiver type before ordering, or contact us for help identifying the correct part.
How many retention pieces are included?
Each package contains 10 M Sensor Retention pieces.
Does the package include a receiver?
No. This product contains retention pieces only. Receivers, domes and hearing aids are not included.
How do I attach and position the retention?
The retention attaches directly to the compatible receiver. Once fitted, insert your earpiece as usual and gently tuck the retention arm into the bowl of your outer ear so that it rests comfortably.
If you are unsure how to attach it to your receiver, ask your hearing care professional to demonstrate the correct fitting.
What is the M Sensor receiver?
A receiver is the small speaker that delivers sound from your hearing aid into your ear. The M Sensor receiver used with Phonak Audéo Fit also incorporates sensor technology for heart-rate tracking. The retention is a separate support accessory that helps hold the receiver in position.
How to attach the retention
This short video from Phonak demonstrates how to attach a retention to an SDS 4.0 receiver on a Phonak Audéo M hearing aid. The M Sensor receiver is not shown.
Watch Phonak’s retention attachment demonstration on YouTube.
Related products
Looking for replacement parts for your Phonak Audéo Fit? See our M Sensor receiver and Phonak 6.0 Vented Clear Domes.



