Features: [Bluetooth wireless transmission] Just connect your device with the Bluetooth audio adapter, whether you use old speakers, old stereo or car stereo, you can easily connect the music becomes wireless music. [Equipped with TF Card Slot] The Bluetooth stereo receiver adapter is equipped with a TF card slot (maximum support 64G) and Bluetooth mode. You can choose to play your favorite songs from your smart device or TF card! [Stable Connection and Subwoofer Mode] With Bluetooth 5.0, the Bluetooth stereo receiver provides a more stable connection without lag or delay. The 3D button is designed for bass heavy mode and provides powerful and heavy music in addition to crystal clear sound. [Wide coverage] The Bluetooth stereo receiver can cover an area of 15M, and the connection is stable. No longer limited by cables, giving you more convenience and a smooth and enjoyable music experience. Product parameters: 1. Bluetooth solution: 5.0 EDR, A2DP, HSP, AVRCP 2. Frequency: 2.4GHz-2.48GHz 3. Bluetooth receiving distance 10 meters 4. Charging voltage: DC 5V 7. Bluetooth receiving function: connect 1 mobile phone