These are 4 types to choose :

1) 50W Amplifier DC 6-12V

2) 50W Amplifier DC 6-12V

3) 6W Amplifier DC 5V-32V

4) No Amplifier DC 9V-12V

50W 6-12V

1. Bluetooth version 5.0
2. Support calls (long press the pause button to answer the call when there is an incoming call).
3. Support recording. Recording only supports operation in TF mode or USB mode.
(Long press the MODE button to start recording, long press the MODE button again to cancel the recording and play the recording file; exit the recording mode and long press the pause button to exit. When recording, you need to connect a storage device, such as: U disk or TF card;)
4. Support power off memory
6. The power supply voltage supports between DC6v-12v, and the current is between 1-3A.
7. It can be directly connected to the speaker, with power amplifier and Bluetooth decoding function.
8. Support song format MP3 / WAV / APE / FLAC
9. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/
10. Power 50W, true stereo 2*25W.
11. Support folder selection and playback. When USB or TF is playing, there is a folder in the device and there are songs in the folder. Press the previous button or the next button twice to select the folder to play the song, and the screen will display F001-F00? and so on, yes? F00 is displayed for each folder? .

50W 6-12V

1. Bluetooth version 5.0
2. Support calls (long press the pause button to answer the call when there is an incoming call).
3. Support recording. Recording only supports operation in TF mode or USB mode.
(Long press the MODE button to start recording, long press the MODE button again to cancel the recording and play the recording file; exit the recording mode and long press the pause button to exit. When recording, you need to connect a storage device, such as: U disk or TF card;)
4. Support power off memory
6. The power supply voltage supports between DC6v-12v, and the current is between 1-3A.
7. Can be directly connected to the speaker, with power amplifier and Bluetooth decoding function.
8. Support song format MP3 / WAV / APE / FLAC
9. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/
10. Power 50W, true stereo 2*25W.
11. Support folder selection and playback. When USB or TF is playing, when there is a folder in the device and there are songs in the folder, press the previous button or the next button twice to select the folder to play the song, and the screen will display F001-F00N

6W 5-32V

Feature:

Model: JQ-D029BT

Master IC: Jerry AC6926

Bluetooth IC: AC6926 Bluetooth version 5.0

Power supply voltage: 5V-32V,

Power: 2 * 3W, two 3W speakers can be connected at the same time

With call and recording function

Music format: MP3 / WMA / WAV / APE / FLAC lossless music 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-32V

About the structure: Panel size: 93 * 36 MM, the two corners of the panel and the position of the screw holes, the depth of the board is 33 MM

No Amp DC 9V-12V

Feature:

Dimensions: 106*25mm

USB: Connect USB flash drive (maximum support 32GB, not included)

LED color screen: digital screen display, showing red

Infrared receiving module

TF: Connect TF memory card (maximum support 32GB, not included)

AUX: audio input interface

VOL-: Short press is to select the previous song; long press is to decrease the volume

PLAY/PAUSE: Short press is the switch between pause and play; long press is the FM FM automatic station

VOL+: Short press is to select the next song; long press is to increase the volume

MODE: Switching of USB/TF/FM/LINE IN/BLUETOOTH 5.0