Unitron Insera B-312 NW O
Non-wireless custom ITE with a telecoil
Insera B-312 NW O is from Unitron's Blu platform, launched in 2021 and two generations behind Smile, but still listed in the UK. It is a non-wireless, omnidirectional custom model with a telecoil, for people who prioritise size over connectivity.
- Connectivity
- None (non-wireless)
- Style
- In-the-ear custom (non-wireless)
Disposable
Battery · Size 312 zinc-air
Who it's good for
Is Insera B-312 NW O right for you?
Our audiologists' guide to how this model suits different lifestyles, based on its features. Your hearing test results matter most, so we'll always confirm at your appointment.
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Everyday real world
3/5
Older automatic platform; fine for everyday use but behind current Unitron models.
Best for everyday → -
TV turner-uppers
1/5
No Bluetooth or TV streaming.
Best for TV → -
Golfers and outdoors
3/5
No IP rating published.
Best for golf → -
Socialites
2/5
Omnidirectional microphone gives limited focus in groups.
Best for social → -
Phone and video calls
2/5
No direct call streaming; a telecoil or streaming accessory can help on the phone.
Best for calls → -
Music lovers
2/5
No streaming, so music is heard naturally through the microphones only.
Best for music → -
Active and sporty
2/5
No published water rating, so keep it dry during exercise.
Best for active → -
Tinnitus sufferers
4/5
Built-in Unitron tinnitus sound generator.
Best for tinnitus →
The interesting technical bits
What's inside
- Blu platform with automatic sound environments
- Non-wireless, omnidirectional microphone, telecoil
- Tinnitus masker
About Unitron Insera B-312 NW O
Insera B-312 NW O is from Unitron's Blu platform, launched in 2021 and two generations behind Smile, but still listed in the UK. It is a non-wireless, omnidirectional custom model with a telecoil, for people who prioritise size over connectivity.
Specifications
From manufacturer information, checked October 2026. Battery figures vary with streaming and settings. Your audiologist will confirm the right receiver, dome and settings at your fitting.
| Brand | Unitron |
|---|---|
| Family | Insera (Blu) |
| Style | In-the-ear custom (non-wireless) |
| Launched | 2022 |
| Chip / platform | Blu |
| Technology levels | 9, 7, 5, 3, 1 |
| Power | Size 312 zinc-air disposable |
| Streaming | None (non-wireless) |
| Hands-free calls | No |
| Auracast broadcast audio | No |
| Tinnitus support | Yes |
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