Specification: Product color: black Battery capacity: 140Amh Working range: 10m (without obstacles) Charging time: 1h Use time: 4h Applicable type: computer, TV, projector (transmitting mode)/speaker, earphone (receiving mode) Connect the Bluetooth connector to the car's AUX interface through the adapter/transmission cable (standard), and then connect the Bluetooth to the car stereo, you can not only make calls, but also listen to beautiful music, so your journey is no longer lonely CD-level enjoyment of lossless sound quality: high-resolution restoration of lossless sound quality, bringing CD-level music experience in only one place, you can listen to music on your phone Fully charged once, can be used for 4 hours: the built-in rechargeable lithium battery can be charged once, and can be used for 4 hours when the battery is low, convenient and worry-free Bluetooth 5.0 listening to songs without delay: low power consumption and high stable signal transmission rate, listening to songs more smoothly Package Included: 1 *Adapter 1 *Charging cable 1 *Manual