These are 2 types to choose :

1) 50W DC 5V-25V ：2*25W , 3.5mm Microphone

2) No Amp DC 5V-12V ：No Amplifier , 6.5mm Microphone

50W DC 5V-25V

Bluetooth version is 5.0.
Music format: MP3/WMA/WAV/FLAC/APE lossless format.
Bluetooth calling function
3.5mm Microphone interface function

Power: 2*25W, and two 25W speakers can be connected at the same time.
Recording function
Folder switching function
Radio FM frequency: 87.5—107.5mhz.
kebidu Decoder Board Introduction of support function: Support MP3/USB/TF/LINE IN/FM/Bluetooth/remote control/DC 5V-25V

About structure: panel size: length 115 * width 52 MM, screw holes around the panel, and the depth of the panel is 28 mm.

Buttons and interface functions

1. USB interface: connect to U disk (maximum support 32GB);

2. LCD screen: synchronized lyrics display;

3. MIC: Support call and recording function;

4.  IR: infrared receiver module;

5. Volume knob: control the volume;

6. MODE: Switch between USB / TF / FM / AUX / BLUETOOTH;

7. REC: Long press the REC button to start recording, press the REC button again to cancel the recording function and play the recording file; when recording, it is more necessary to connect a storage device, such as a U disk or TF card;
8. PLAY/PAUSE: Short press is to switch between pause and play; long press is to radio FM automatic station;

9. 3.5MM Microphone 

10. TF card slot: connect to TF card (maximum support 32GB);

11. AUX interface: audio input interface;

12. NEXT: Short press is to select the next song; long press is to fast forward;

13. PREV/: Short press is to select the previous song; long press is to rewind;

No Amp DC 5V-12V

Bluetooth version is 5.0

Music format: MP3/WMA/WAV/FLAC/APE lossless format

Radio FM frequency: 87.5-107.5 MHZ

Support function introduction: support MP3 / USB / TF / LINE IN / FM / BLUETOOTH / remote control connection / DC 5V or 12V (optional)

About structure: Panel size: 75*50 MM, screw holes around the panel, the depth of the board is 18MM

Infrared receiver module

TF card slot: connect TF memory card (maximum support 32GB, not included);

LED: digital color screen display, showing red;

AUX interface: audio input interface

MIC: support microphone function

USB interface: connect U disk (maximum support 32GB, not included);

PREV/VOL-: short press is to select the previous song; long press is to decrease the volume

PLAY/PAUSE: short press is to switch between pause and play; long press is to radio FM automatic station;

NEXT/VOL+: short press is to select the next song; long press is to increase the volume;

MODE: Switch between USB/TF/FM/AUX/BLUETOOTH;

Package included:

1 x MP3 WMA WAV Decoder Board

1 x Remote control (without batteries)

1 x Cables