Check the listing for details. USB Wireless Bluetooth 5.0 Transmitter Receiver for Car Music Audio Aux Adapter. Color: Black, Condition: New. Listed at 7.99 USD. Specifications:Type: bluetooth receiverManufacturer model: C28Color: blackMaterial: plasticBluetooth version: V5.0Port: 3.5mm jackBattery capacity: 140mAh (built-in rechargeable lithium battery)Operating frequency: 2.4 (MHz)Charging time: 1 hourCharging mode: USB cableTransmission distance: 10 metersTransmission rate: 100 (Mbps)Suitable for: computer, TV, projector /car, speaker, earphone (receiving mode)Product size: 59.5*22*12mm (length * width * thickness)Package weight: 39g Product features:*function: Bluetooth receiving mode: Receive Bluetooth signal and transmit it to wired audio through Bluetooth connection. *Connect the Bluetooth connector to the car AUX port through the adapter/transfer cable, and connect the Bluetooth to the car audio, you can not only make calls, but also listen to dynamic music, so that your journey is no longer lonely. *High-resolution restoration of lossless sound quality, bringing CD-level music experience. *Built-in rechargeable lithium battery, which can be used for 4 hours with one hour charge. It can be used while charging when the battery is low, which is convenient and worry-free. *Bluetooth 5.0 + EDR can achieve a more stable connection with the device, low power consumption and high rate stable signal transmission, and listening to songs more smoothly. *Small size, no driver required, easy to use. It is suitable for devices with 3.5 mm jacks. Packing list:1/2/3/4/5 x Bluetooth receiver1/2/3/4/5 x USB charging cable1/2/3/4/5 x 3.5mm audio head1/2/3/4/5 x User Manual