1. Bluetooth version 5.02. Support calling (long press the pause button to answer the call when there is a 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 recorded file; exit the recording mode and long press the pause button to exit. When recording, you need to connect a storage device, such as a U disk or TF card;)4. Support -off memory5. The supply voltage supports between DC6v-12v, and the current is between 1-3A.6. Can be directly connected to speakers, with amplifier and decoding functions.7. Support song formats MP3/WMA/WAV/APE/FLAC8. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control9. 50W, true stereo 2*25W.10. Size: 89x24MMremote control supply: 1 X CR2025 batteries (not included)Colour:silverMaterial:plasticPackage Contents:1 x Decoding board1 x remote control (no battery included)4 x cableOnly the above package content, other products are not included.Note: Light 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.