USB Wireless Transmitter Bluetooth 5.0 Receiver 2in1 Audio Adapter 3.5mm Aux Car Specifications: Type: bluetooth transmitter receiverColor: blackMaterial: plasticBluetooth version: V5.0Port: 3.5mm jackBattery capacity: 120mAh (built-in rechargeable lithium battery)Operating frequency: 2.4 (MHz)Charging mode: USB cableTransmission distance: 10 metersTransmission rate: 100 (Mbps)Suitable for: computer, TV, projector (transmitting mode)/car, speaker, earphone (receiving mode)Product size: 103*68*18.3mm (length * width * thickness)Package weight: 39g 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. Color that you placed will be first choice to delivery. But if it is out of stock, other colors will be replaced. Please read this note as carefully as you can when you place an order. 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.