Fangrui Product Details 1. Features: 2. [bluetooth Wireless Transfer]just Pair Your Device With The Bluetooth Audio Adapter, No Matter You Are Using Old Speakers, Old Stereo Or Car Audio System, You Can Easily Connect The Music Becomes Wireless Music. 3. [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 4. [stable Connection And Subwoofer Mode]with Bluetooth 5.0, The Bluetooth Stereo Receiver Provides A More Stable Connection Without Lag Or Lag. The 3d Button Is Designed For Bass-heavy Mode, Providing Powerful And Heavy Music In Addition To Crystal Clear Sound. 5. [wide Coverage]bluetooth Stereo Receiver Can Cover A Range Of 15m, And The Connection Is Stable. No Longer Limited By Cables, Providing You With More Convenience And A Smooth And Enjoyable Music Experience. 6. Product Parameters: 7. Bluetooth Solution: 5.0 Edr, A2dp, Hsp, Avrcp 8. Frequency: 2.4ghz-2.48ghz 9. Bluetooth Receiving Distance 10 Meters 10. Charging Voltage: Dc 5v 11. Bluetooth Receiving Function: Connect 1 Mobile Phone