Description: Bluetooth 5.0 version: The 3.5mm plug can connect audio devices such as cars and sound effects without Bluetooth through the AUX interface, so that it has Bluetooth function. AUX port connection signal transmission is more stable, faster, and Bluetooth connection is simpler. Sound quality: gold-plated 3.5mm plug + enameled copper wire core, not afraid of oxidation, but also enhance the sound quality. Anti-current interference circuit design, effectively isolate current noise. Material: 0.35-1m spring wire, the wire is made of high resilience TPE material, which can be stretched freely without deformation, anti-winding and not messy, convenient for storage and use. Support hands-free calling: release your hands to make driving safer. Built-in high-definition noise reduction microphone, incoming calls are clear and echo-free. The barrier-free linear transmission is 10 meters. Memory connection: After connecting for the first time, it will automatically pair and connect when it is turned on next time. USB is directly powered, so there is no need to worry about insufficient power and battery life. Specification: Model: Universal Interface: USB Transmission rate: 9Mbps Effective working radius: 10m Bluetooth standard: 5.0 Operating frequency: 2400MHz Size Chart: Line Length: Unstretched 35cm Stretched 110cm Package Includes: 1 Piece Bluetooth Aux Adapter Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!