Function: 1 . [Multifunctional] With this tape adapter, you can answer calls or control music on the receiver, change the volume, play, pause, skip music and have a long play time.2. [Compatible] Cassette adapter supports any mobile phone, tablet, MP3 player, car stereo, headset or other devices equipped with standard Bluetooth technology.3. [Stereo] smart design for secure connection, double shielding, polished metal and corrosion-resistant gold-plated plugs, high fidelity, seamless stereo sound transmission.4. [Good performance] Every small component of the tape receiver has been tested thousands of times, intelligent noise reduction to ensure reliable performance and minimal signal loss.5. [Easy to use] This cassette adapter allows you to continue to enjoy music on your phone without changing or modifying your car, it is simple without cables, with stable and fast transmission.Specification: Item Type: Cassette Adapter Material : ABS Belt Size: Approx. 10 x 6.4 x 1 cm / 3.9 x 2.5 x 0.4 in Black color Battery: Lithium battery capacity: 300mAh Bluetooth: 5.0 Parameter: Supports any mobile phone, tablet, car speaker or other devices equipped with standard Bluetooth technology Perfect for home or car speaker system High fidelity sound, long playing time, stable and fast transmission, no cable, simple How to use: Take out the product and use it. Package List: 1 x Cassette Adapter 1 x USB Power Cable