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.(When recording, you need to connect a storage device, such as: U disk or TF card;)4. Support -off memory5. The supply voltage supports between DC 7v-22v, and the current is between 1-4A.6. Can be directly connected to speakers7. Support song format MP3/WMA/WAV/APE/FLAC8. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control9. 100W, stereo 2*50W.10. Support folder selection to play. 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 button twice to select the folder to play songs, and the screen will display F001-F00? and so on, yes? A folder displays F00? .Model: -Y04 (2*50W stereo, supply 7V-22V)Colour:blackMaterial:plasticPackage Contents:1 x decoder1 x remote control A4 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.