Features: Excellent Material: Built-in power isolation module filtering current interference rejecting "zipping" sound. Enameled copper wire core high fidelity transmission no noise no current sound. High-definition Sound Quality: Clear and noiseless calls built-in microphone support CVC call noise reduction technology one-key free and clear calls stable transmission no delay and no lag. Safe Navigation: Cell phone connected to the car stereo expand the playback volume real-time broadcast do not miss the next intersection. Automatic Connection with Car Start: Plug and play after the first successful pairing of cell phone and device start the car can be automatically connected. Applicable to: Connect the car audio restore the dynamic sound quality support SBC/AAC high-definition audio decoding clear restoration of music details all the way to listen to good sound. Specifications: Interface: 3.5 TF Transmission Rate: 300 (Mbps) Effective Working Radius: 10(m) Bluetooth-compatible Standard: 5.0 Operating Frequency: 20 (MHz) includes: 1 *Aux to Bluetooth-compatible Receiver 1 *Instruction Manual