Specification: Item Type: Cassette Adapter Material: ABS Tape Size: Approx. 10 x 6.4 x 1cm / 3.9 x 2.5 x 0.4in Color: Black Battery: Lithium Battery Capacity: 300mAh Bluetooth: 5.0 Parameter: Support Any Mobile Phone, Tablet, Car Speaker or Other Devices Equipped with Standard Bluetooth Technology Ideal for Home or Car Speaker System High Fidelity Sound, Long Playing Time, Stable and fast Transmission, No Cable, Simple Package List:1 x Cassette Adapter 1 x USB Power Supply Cable Note:Manual measurement, please allow 0.40.7in error. [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. [Compatible] The cassette adapter supports any mobile phone, tablet, MP3 player, car stereo, headset or other devices equipped with standard bluetooth technology. [Stereo] Smart design creates a safe connection, double shielding, polished metal and corrosion resistant gold plated plugs, high fidelity, seamless transmission of stereo sound. [Good Performance] Every small component of the tape aux receiver has been tested thousands of times, intelligent noise reduction, to ensure reliable performance and minimum signal loss. [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. [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. [Compatible] The cassette adapter supports any mobile phone, tablet, MP3 player, car stereo, headset or other devices equipped with standard bluetooth technology. [Stereo] Smart design creates a safe connection, double shielding, polished metal and corrosion resistant gold plated plugs, high fidelity, seamless transmission of stereo sound. [Good Performance] Every small component of the tape aux receiver has been tested thousands of times, intelligent noise reduction, to ensure reliable performance and minimum signal loss. [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.