KEF Mu3 are noise-cancelling true wireless earphones engineered for clean, accurate sound in a compact, ergonomic form. Designed in collaboration with Ross Lovegrove, Mu3 pairs KEF tuning with everyday practicality—stable Bluetooth connectivity, splash-proof protection, and controls that stay simple when you’re on the move.
| Model | Mu3 |
| Driver | 8.2mm |
| Frequency range | 20Hz – 20,000Hz |
| Sensitivity | 104dB/1mW at 1kHz |
| Impedance | 16Ω |
| Bluetooth version | 5.0 |
| Codec support | SBC, AAC |
| Bluetooth range | Up to 10m |
| Bluetooth frequency | 2.402GHz – 2.48GHz |
| Bluetooth power | ≤13dBm |
| Max power output | 5mW |
| Battery (earbud) | 55mAh (Li-ion rechargeable) |
| Battery (charging case) | 500mAh (Li-ion rechargeable) |
| Playback time (earbuds) | Up to 9 hours (Bluetooth + ANC on) |
| Playback time (case) | Up to 15 hours |
| Fast charging | 5 mins charge = up to 1 hour playback |
| Dimensions (earbud) | 24.5 × 17.5 × 26.3 mm (H × W × D) |
| Dimensions (charging case) | 33.5 × 62 × 52 mm (H × W × D) |
| Power input | DC 5V 600mA |