Allinone audio solution The product combines Bluetooth earphones, an MP3 player, and a recording device in a single unit, delivering three core capabilities in one device. Dual mode switching Bluetooth and card insertable dual mode switching. You can switch between Bluetooth playback and cardbased MP3 playback as needed. Bluetooth 5.3 for smoother transmission Equipped with a Bluetooth 5.3 chip to enable smoother transmission and more reliable wireless connectivity. Advanced sound pickup and noise reduction Deeply customized sound pickup and noise reduction algorithm that actively recognizes human voices according to the scene, reduces environmental noise interference, and improves voice clarity during recording and playback. Key benefits Simplified workflow: use Bluetooth for wireless listening or switch to the cardbased MP3 mode for offline playback without needing separate devices. Improved call and recording quality: sceneaware voice recognition helps emphasize spoken words while lowering background noise. Flexible media options: store MP3 files on the card for offline listening and use the recording function for memos, interviews, or notes. Use scenarios Commuting or travel: listen to music or audio via Bluetooth, or switch to card mode to play stored MP3 files. The device can also record quick notes while on the move. Classes, meetings, or field work: record lectures or interviews with reduced ambient noise, benefiting from the voicefocused noise reduction algorithm for clearer recordings. Daily activities requiring portable audio and recording: enjoy synchronized listening and the ability to capture important moments or ideas on the spot. Compatibility and versatility Works with Bluetoothenabled devices for wireless audio streaming. Card insertion provides an offline MP3 playback option, enabling stored music and recordings without a separate player. Notes All features are presented as described: Bluetooth earphones functionality, MP3 playback via card, and recording capability, with Bluetooth 5.3 transmission and sceneaware noise reduction.