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. (When recording, insert the microphone to speak, and you need to connect a storage device, such as: U disk or TF card;) 4. Support power-off memory. 5. The power supply voltage supports DC3.7V-5V, and the current is about 1-3A. It can be directly connected to the speaker, with a single-channel power of 10W. Supports MP3 music format Main functions: MP3/USB/TF/LINE IN/FM/BLUETOOTH/6.5MM microphone Power: 10W. Black wire for radio antenna, 2 red wires for power and speaker wires. 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.