Aux Bluetooth Adapter Audio Cable For Cars USB Bluetooth 3.5mm Jacks Receiver Transmitter Music Speakers Dongle Handfree Features: Compatibility 1 : Speaker/Headphone/Car audio Compatibility 2 : Laptop/Smartphone/Tablet Transmission distance:10 meters Bluetooth version:Bluetooth V 5.0 Length: 0.35~1.1m extend Interface:USB to 3.5mm jack Bluetooth indicator: blue LED -Bluetooth 5.0:The new Bluetooth 5.0 wireless transmission technology brings more stable audio transmission capability. -Multi-function:Connect the product with the USB interface and AUX interface of the equipment, for car use or audio connection, travel or home,Can be with you. -One to two:You can connect two devices at the same time without downloading any drivers. Abandon singleness and add more fun to use. -Easy-to-use:Plug and play, automatic connection after startup. Operation Guide: 1. Connect the Audio port with a 3.5 mm AUX plug. 2. Connect the power port with a USB plug. 3. Turn on the Bluetooth in your cell phone and find ''RT08'', then click to pair.