Using Bluetooth 5.0 version, the compatibility, stability and response speed are the previous version. The 3.5mm plug can be connected to audio equipment such as and without Bluetooth through the AUX interface, so that it has Bluetooth function. The anti-current interference circuit design effectively isolates the 'squeak' caused by the current, making the sound quality more pure. Support hands-free calling, free your hands and make driving . Built-in high-definition noise-canceling microphone, incoming calls are clear and -free. Directly powered by USB, no need to worry about low power and battery life. Output interface: 3.5mm Bluetooth version: 5.0 Bluetooth name: EB01 Transmission distance: 10 without obstacles Line length: unstretched 35cm, stretched 110cm Colour:black Material:Zinc Package Contents: 1 x Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.