HiFi speakers and HD noise reduction recording External builtin frequency speaker unit with a custom metal diaphragm delivers clear sound. Recording at 1536 kbps ensures important content such as entire classroom recordings, forensics, and meetings are captured with clarity. Wireless Bluetooth 5.0 with stereo solution speed Bluetooth 5.0 chip provides a stable wireless connection and stereo playback. HiFi lossless sound quality and user experience Lossless core decoding chip supports mainstream lossless music formats. Capacitive touch controls enable quiet, smooth operation with no interference to others. Background playback is supported. Use scenarios Classroom recording and lectures Meetings and corporate presentations Forensic interviews and field recordings Key attributes Function: HiFi speakers, HD noise reduction recording, wireless Bluetooth 5.0, lossless sound with background playback Compatibility: Supports mainstream lossless formats; Bluetooth 5.0 for wireless devices Size and material: External builtin frequency speaker unit with a custom metal diaphragm Performance: Capacitive touch controls for silent operation, responsive, and interference use