materials,ensuring the purities and stabilities of audional transmission. USB C adapter end is applicable for Action 2/3/4. The other end is standard 3.5mm interfaces,compatibility with 3.5mm port mainstream microphones. Audional adapter cable,to 3.5mm connector,insert and play. Adopting advanced digital audional decoding chips for lossless decoding,effectively improving audional and making the sound more clear.