Features: - The converter can convert MP3, MP4, computer, mobile phone and other players supporting BT function into car cassette tapes. - Easy to operate, you just need to insert the converter into your car cassette player after BT pairing, and then press to play and enjoy music. - Support BT answering or making calls, music playing (audio format: AAC, MP3, SBC, stereo) - Clear sound and good sound quality, providing a wonderful hearing enjoyment. - With the built-in lithium battery, recharging andamp recyclable, more convenient and economical. - With this converter, you can enjoy your favorite music during driving or through household players, no longer restricted by radio station, making your driving and life more relaxing. Specifications: Material: ABS Color: Black Power Supply: 1 x 3.7V 120 mAh battery Item Size: Approx. 10.2x6.4x1.2cm or 4.02x2.52x0.47in Item Weight: Approx. 37.5g or 1.32oz Package Size: Approx. 19x11.2x1.3cm or 7.48x4.41x0.51in Package Weight: Approx. 52.5g or 1.85oz Packing List: 1 x Cassette Tape Converter