Check the listing for details. USB Wireless Transmitter Bluetooth 5.0 Receiver 2in1 Audio Adapter 3.5mm Aux Car. 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:1x Bluetooth receiver1x USB charging cable1x 3.5mm audio head1x User Manual 🚩Buyer's Note: Please allow 1-3mm（0.039in) differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. If you have any questions , please feel free to contact us. Your comment is very important to us, please don't give us a negative feedback, we'll solve all your problems, thank you for your support. You could contact me directly if you need wholesale, we will give you the best price. Thank you for your purchase!