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 DC 3.7v-5V, and the current is about 1A. Can be directly connected to the speaker, with an amplifier 2*3W/5W power Support song formats MP3/ WAV / FLAC Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/6.5MM microphone Stereo 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.