FIIL Key uses a 13mm tailor-made titanium-coated diaphragm, but this is only one aspect. The excellent sound adjustment ability of the FIIL technical team over the years is the soul of FIIL Key's good sound quality.
FIIL Key supports the new Bluetooth 5.3, bringing faster and more stable connections. In addition to Bluetooth 5.3, FIIL Key supports Low Latency Mode, which brings a more stable and smooth gaming experience when enabled in the fiil+ App
FIIL Key supports Dual-Mic ENC call noise cancellation. Dual-Mic can accurately identify call noise and reduce ambient noise through algorithms. Even if you are in the subway, the person answering your phone can hear your voice clearly.
Battery life : 5 hours (music playback) 24 hours (total with charging case)