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. USB Wireless Bluetooth 5.0 Transmitter Receiver for Car Music Audio Aux Adapter Specifications: Type: bluetooth transmitter 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 (transmitting mode)/car, speaker, earphone (receiving mode)Product size: 59.5*22*12mm (length * width * thickness)Package weight: 39gPacking size: 103*68*18.3mm Product features:-2 in 1 function: Bluetooth transmission mode: convert wired audio into Bluetooth signal and transmit it to Bluetooth device. Bluetooth receiving mode: Receive Bluetooth signal and transmit it to wired audio through Bluetooth connection. -Connect the 3.5mm audio interface of the TV, and transmit the sound to the earphone via Bluetooth, so that you are not afraid to disturb your family when watching late-night movies (note: it is used in the transmission mode (TX)). -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* Bluetooth receiver transmitter1* USB charging cable1* 3.5mm audio head1* User Manual Feedback: 1) Your Feedback is really important to us,please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much!2) We always offer the lowest price for best goods and service to you. 3) Please contact us before leaving neutral(3 stars) or negative(1-2 stars) feedback.We will try our best to solve the problem and leave you a happy shopping mood here. Thank you!