UNO system 4.0 allows people with hearing loss to hear and participate in conversations and is suitable for having a conversation while listening to TV, or for participating in conversations at meetings, lectures, etc. UNO system 4.0 can be used with many devices with LE Audio, Auracast, such as hearing aids or headphones.
| The following specifications may only comply to some variants. |
| Built-in directional microphone |
| More channels possible |
| Connection to external equipment via jack stick |
| Rechargeable battery |
| Bluetooth |
