Function: 1. [Multifunction] 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 playing time. 2. [Compatible] The cassette adapter supports all mobile phones, tablets, MP3 players, car stereos, headsets or other devices equipped with standard Bluetooth technology. 3. [Stereo] Smart design creates a secure connection, double shielding, polished metal and corrosion-resistant gold-plated plugs, high fidelity, seamless transmission of stereo sound. 4. [Good performance] Every small component of the tape aux 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 the 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 Tape Size: Approx. 10 x 6.4 x 1 cm / 3.9 x 2.5 x 0.4 inch Color: Black Battery: Lithium Battery capacity: 300mAh Bluetooth: 5.0 Parameter: Support all mobile phones, tablets, car speakers or other devices equipped with standard Bluetooth technology Ideal for home or car speaker systems High fidelity sound, long playtime, stable and fast transmission, no cable, easy Package List: 1 x Cassette Adapter 1 x USB Power Note: Manual measurement, please allow 0.4-0.7 inch error.