1. Bluetooth version 5.02. 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 memory5. The power supply voltage supports between DC 6v-12v, and the working current is between 1-2A.6. Can be directly connected to speakers, with power amplifier and decoding functions.7. Support song format MP3 / WAV / APE / FLAC8. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/9. Power 6W, true stereo 2*3W.10. 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.Colour:blackMaterial:plasticSize:95 x 35mmPackage Contents:1 * audio module1 * remote control1 * cableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.