Finding: 1. Bluetooth version 5.0 has been adopted, which has better compatibility, stability and response speed than the previous version 2. Compared with FM Bluetooth transmitter, the signal transmission through the aux port is more stable, faster and the Bluetooth connection is easier (because the FM Bluetooth transmitter is a mobile phone connected to the transmitter via Bluetooth, and then the transmitter is connected to the speaker equipment in the car through FM FM, among which there are more transmissions, and FM is easy to be disturbed by radio waves. This is a mobile phone Bluetooth connected to the receiver.The receiver is directly connected to the o-device through the wire, so the transmission signal will be better and the connection will be easier) 3. Compared with a 3.5mm adapter to connect to Bluetooth - the adapter is the adapter is easy to lose. This one has a 1.2m spring line, which is easy to store and use (the spring is not stretched for 45cm) 4. Support hands-free communication and release your hands to make driving more comfortable. Built-in high-definition noise-reducing miophone, clear and echo-free calls 5. Barrier-free straight line 10m transmission 6. USB direct power , you don't need to worry about power and battery life 7. Gold-plated 3.5 mm connector, not afraid of oxidation, better sound quality 8. Memory connection. After the first connection, it can be automatically connected and connected after the next start2 Specifications: Product parameters : KUULAA Name: Car Bluetooth 5.0 Adapter Model: KL-YP04 Output interface: 3.5mm Bluetooth version: 5.0 Material: TPE + aluminum alloy Transmission distance: 10 meters Length: 35-100cm Color blue Suitable for: Compatible with all Bluetooth devices package includes: 1 * Adapter Item No.