Features: [Wireless Bluetooth Transmission] Simply connect your device with the Bluetooth audio adapter. Whether you're using old speakers, a vintage stereo, or a car stereo, you can easily stream music wirelessly. [Equipped with TF Card Slot] The Bluetooth stereo receiver adapter features a TF card slot (supports up to 64G) in addition to Bluetooth mode. Choose to play your favorite tunes from your smart device or TF card! [Stable Connection & 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 a bass-heavy mode, delivering powerful and punchy music alongside crystal-clear audio. [Wide Coverage] The Bluetooth stereo receiver covers a range of up to 15 meters, ensuring a stable connection. No longer restricted by cables, providing you with more convenience and a smooth, 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