Virtual On/off option; host computer can modify frequency and gain for precise tonal control and balanced sound. 3D sound effects On/off option; host computer can modify intensity to create a more immersive listening environment. U disk decoding formats Plays from USB drives in MP3, WAV, WMA, AAC, APE, and FLAC formats for broad compatibility and convenient playback. EQ function Builtin 5 EQ presets; host computer can the EQ for tailored tone and sound shaping. Use scenarios Desktop PC listening: connect to a computer, enable Virtual or 3D effects as needed, and adjust the EQ to match your music or spoken content. USB drive playback: store music or audio on a USB disk and enjoy compatible formats with convenient playback without additional software. Multimedia creation and viewing: finetune sound with the EQ and spatial effects to suit video editing, gaming, or multimedia projects. Benefits at a glance Flexible sound with Virtual and 3D sound effects controlled via the host computer. Broad format support through USB drive decoding for versatile playback. tone with 5 builtin EQ options plus hostdriven EQ adjustments.