M02 3.5mm AUX Car Audio System Wireless Adapter Car Bluetooth Hands-Free Call Spring Cord 1.Transform the traditional speaker into a wireless audio system 2.Bluetooth 5.1 signal stable transmission does not lag, listen to music and call more smoothly 3.High elastic TPU spring cord design, 0.3m-1.2m free expansion, anti-winding, not messy 4.Connect the mobile phone to the car audio, expand the volume and broadcast in real time, concentrate and drive more easily 5.Built-in noise-cancelling microphone for precise sound reception, high-definition calls, safer driving Specifications: 1.Model: M02 2.Bluetooth version: 5.1 3.Output interface: 3.5mm audio 4.Transmission distance: 10m 5.Signal-to-noise ratio: Greater than or equal to 90dB 6.Frequency response: 20Hz-20KHz 7.Material: zinc alloy 8.Line length: 0.3m-1.2m 9.Power supply: USB2.0 10.Main functions: car Bluetooth audio receiver + call [built-in isolation IC, no current sound]