Car audio system instantly turns into Bluetooth, wireless music listening, hands-free calling, one click connection, bidding farewell to tedious tasks 0.3M-1.5M flexible expansion and contraction, the thread body is made of high rebound woven material, anti winding, good elasticity, orderly, and not messy Built in power isolation template filters current interference Support SBC high-definition audio decoding, clearly restore music details, and listen to good sound all the way After successfully pairing the phone and device for the first time, start the car and it will automatically connect Specifications Bluetooth version protocol: V5.1a2dp/avctp/avdtp/avrcp/hfp/spp/smp/att/gap/gatt/rfcomm/sdp/12cap Bluetooth transmission distance: unobstructed greater than 10 meters Power interface: USBA male connector Audio output interface: 3.5 male head Call function: Support, USBA male head with built-in silicon microphone Working voltage: 3.6-5.5V Working current: 20mA Max Indicator light status: After USB power supply, the green light flashes rapidly. After successful Bluetooth connection, the green light flashes slowly Signal to noise ratio greater than equal 90 dB TDH+N:-75 dB Channel separation degree: -80 dB Frequency response: 20Hz-20KHz Length: 0.5M (unstretched state) Colour:As Shown Material:PCV+braided wire Package Contents: 1 * cable