1、Folder Selection and Playback: It is convenient for different music categories to be selected and played, and music categories can be placed in different folders, DJ music, background music, and children's songs in the card and U disk. 2、Loop Mode: Press the "arrow" "RPT" symbol or "play" key in the playback state: random (RAN), single loop (ONE), folder loop (FOL), full loop (ALL); Press to (FOL) in the folder of , to play the whole song in a loop only in this folder. 3、Multifunctional: Decoder board module supports switching between USB, card, Bluetooth, FM, and AUX. Convert alerts and caller numbers. Support MP3, WMA, WAV, FLAC, APE format music. MP3 songs 32‑320kbps, lossless APE, WAV, WMA, FLAC: below 1411kbps. 4、Practical: Support 4 color spectrum luminous display; support USB sound card function (with a double ended USB cable, one end is plugged into the computer, the other end is inserted into the panel USB, the computer can play music through the module's sound output and transfer to the speaker). 5、Bluetooth 5.0: Using Bluetooth 5.0, the connection is stable, and the power off memory function is supported: the songs and volume played before the power off can be memorized to the current point. Suitable for 2.0, 2.1 or 5.1 speaker amplifier boards. 6、Basic Functions: Support USB, card switching, previous song, next song, volume adjustment, EQ, play, pause, stop, single repeat, mute, shutdown, direct song selection. Call back: short press the pause key continuously under the bluetooth status to call back the last call number. Item Type: Bluetooth 5.0 Sound Decoder Board Module Material: ABS Size: Approx. 10.7 x 2.5 x 2.7cm/4.2 x 1.0 x 1.1in Opening: Approx. 8.4 x 2 x 2.7cm/3.3 x 0.8 x 1.1in Screw Mounting Hole Spacing: Approx. 9.2cm/3.6in Bluetooth: Bluetooth 5.0 Working Voltage: DC12V Working Current: 600mA-800mA Output Amplitude: >700mV Remote Control Battery: 1 x Built in CR2025 (Included) Built in Battery Capacity: 240mAh 1 x Bluetooth 5.0 Sound Decoder Board Module 1 x Remote Control 1 x Power Cord 2 x Sound Cable 2 x Dust Cover