Direct connection to speakers with builtin power amplifier and decoding functions. Supports song formats MP3, WMA, WAV, APE, FLAC. Main functions include MP3, USB, TF, LINE IN, FM, BLUETOOTH, remote control, and DC12V. Bluetooth version 5.0. Power output 6W, delivering true stereo twochannel sound (2 x 3W). Compact size 108 x 25 mm. Single unit weight 40 g. Supports folder playback. Includes call and recording support (external recording). Recording only supported in TF mode or USB mode. Poweroff memory remembers the last mode and volume. Power supply voltage 5V, current 0.5–2A. Practical use scenarios In a home stereo setup: connect directly to passive speakers or a power amplifier for enhanced audio playback from MP3/WMA/WAV/APE/FLAC files or via TF/USB sources. As a wireless and portable interface: stream via Bluetooth 5.0 to the device, while using LINE IN or USB/TF playback for local content. In small venues or offices: use as a compact background music and paging solution with folder playback, external recording, and poweroff memory for quick setup.