Phonak CROS II
The smart solution for single-sided hearing
Introducing Phonak Cros II
The Phonak CROS II is a hearing solution designed for individuals with single-sided deafness or unilateral hearing loss. It uses advanced Phonak Venture technology to wirelessly transmit sound from the ear with hearing loss to the better hearing ear, improving speech understanding and awareness of the environment.
The Phonak CROS II is available in several models:
- CROS II-312: This behind-the-ear (BTE) model is the smaller of the two and uses a size 312 battery. It is designed for those who prefer a more compact device.
- CROS II-13: This BTE model is slightly larger, uses a size 13 battery, and includes a volume control button. It offers extended battery life compared to the CROS II-312.
- CROS II-312 Custom: This in-the-ear (ITE) model is custom-made to fit within the ear canal, providing a discreet option for users.
- CROS II-13 Custom: Similar to the CROS II-312 Custom, this ITE model is also tailored to the user’s ear canal but is designed to accommodate a size 13 battery for longer battery life.

Understanding in noisy places
Zoom in on a voice and reduce background noise to hear what you want.
Understanding while driving
Understand your travelling companions with ease as CROS II streams to your good ear
Understanding while out-and- about
Improve the awareness of your surroundings and hear sounds from both directions
Easy to use
Simple and ready to use – just switch it on and enjoy hearing from both sides
Stylish and discreet
Your friends and family will notice your improved hearing much more than your CROS device
CROS II features state-of- the-art Phonak Venture technology. It’s the latest generation chip which makes hearing easier than ever before and brings endless possibilities.
- CROS II automatically detects what listening situation you are in and switches to the best possible setting. You’ll forget you’re wearing it.
- It can zoom in on the voice in front of you for better speech understanding.
Whether you are in a restaurant, on a busy street or simply having a one-on- one chat. With CROS II, you will immediately feel included in a conversation, regardless of the situation. No more having to position yourself so that everyone sits on your good side!
How it works:
CROS stands for ‘Contralateral Routing of Signal’ and consists of two parts:
The CROS aid with a microphone to pick up sounds and voices from the non hearing ear and wirelessly transmit them to the hearing aid.
The hearing aid to receive the signal from the non hearing ear and play it to your good ear CROS II will transmit sound and voices to let your good ear hear for both your ears. If you have good hearing in one ear and impaired hearing in the other, then CROS II will work for you.
Wherever you want
Enables you to have a conversation in quiet and noisy surroundings without having to reposition yourself.
Just switch it on
Requires no surgical procedures. Simply switch it on and enjoy hearing from both sides.
Almost invisible
So small and discreet you can wear it without it being noticed.
Phonak Cross II Types & Styles
Available in a range of colors, styles and performance levels.

CROS II-312
- Behind-the-Ear
- Smallest size
- For your good ear, you can pair with any Phonak Venture RIC or BTE hearing aid
- Battery: 312

CROS II-13
- Behind-the-Ear
- Extended battery life
- Volume control button
- For your good ear, you can pair with any Phonak Venture RIC or BTE hearing aid
- Battery: 13

CROS II-312 Custom
- In-the-Ear
- Smallest custom model
- Optional volume control button
- For your good ear, you can pair with any Virto V with Binaural Voicestream Technology(TM)
- Battery: 312

CROS II-13 Custom
- In-the-Ear
- Extended battery life
- optional volume control button
- For your good ear, you can pair with any Virto V with Binaural Voicestream Technology(TM)
- Battery: 13
Phonak Cros II Hearing Aids Colors
Choose from 11 colors to either match your skin tone or hair color.


Talk to an Audiologist
Speak to one of our Audiologists to find out if you benefit from hearing aids. Book a free 15-minute Audiological phone consultation.