Features:1Professional Design: Car bluetooth aux adapter is designed to turn your home or sound system or speakers into a hands Bluetooth device that can be used to play music or talk on the phone. 2Advanced Bluetooth Technology: Car bluetooth aux adapter is equipped with the latest Bluetooth v5.1 chipset and low latency technology to ensure instant pairing and stable connection within 10m/32.8ft, providing lag hifi stereo sound effect. 3Hands Calling, Plug and Play: 3.5mm aux bluetooth adapter with built in microphone to enjoy Bluetooth playback of music and hands calling plug and play, direct charging via USB and 3.5mm port while playing plug in car or home stereo 4Easy to Use: The 3.5mm aux bluetooth adapter is easy to use, no built in battery, no need to turn it on and off every time, just plug it into the 3.5mm aux jack and power it through the USB port. 5Support System, Auto Connect: Car bluetooth receiver supports sound codec SBC and profile A2DP AVRCP. it starts automatically when the engine starts and connects to the last used device automatically, no need to reconnect. Enjoy wireless music streaming.Package included:1 x&nbspCar Bluetooth Aux Adapter1 x Manual