1. Bluetooth version 5.0 2. Support calls ( and hold the pause button to answer the call when a call comes in). 3. Support recording. Recording only supports TF mode or USB mode. ( and hold the MODE button to start recording, and hold the MODE button again to cancel recording and play the recording file; and hold the pause button to exit the recording mode. When recording, you need to connect a storage device, such as a USB flash drive or TF card;) 4. Support power-off memory 5. The power supply voltage supports DC5V-12V, and the current is about 0.5A. It cannot be directly connected to the speaker. It needs to be connected to the amplifier board and then to the speaker. Support song format MP3 Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control Radio FM frequency:87.5-107.5 MHZ Color:Black Material:plastic Package Contents: 1 x decoder 1 x remote control(excluding CR2025 battery) 1 set x cable Only the above package content, other products are not included. Note: Light reflection 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.