Features: 3.5mm AUX Adapter: You can pair and connect your mobile phone or laptop with your old car stereo/home stereo /3.5mm wired headphones/speakers. It is equipped with advanced Bluetooth-compatible 5.0 chip with stable connection fast transmission speed and wide signal range. Hands-Free Call Built-in Microphone: Car-assisted Bluetooth-compatible adapter has built-in microphone which can answer/hang up/reject/redial calls with one button. In the fully charged mode music can be played continuously for about 10 hours. You can play music while charging. The low power consumption state is also easy to use. Safe Driving: Bluetooth-compatible 5.0 voice navigation. When the device is turned on it will automatically connect to the Bluetooth-compatible of the mobile phone thus realizing hands-free call/navigation broadcast and focusing more on driving. Bluetooth-compatible 5.0 supports remote transmission within 10 meters. Ultra-stable Connection: Our Bluetooth-compatible audio adapter is equipped with Bluetooth-compatible 5.1 chip which can achieve stable pairing fast transmission and wide signal range 33 feet. With the help of 3.5mm AUX port you can connect non-Bluetooth-compatible car audio system home audio wired headphones/speakers power amplifier/home theater etc. Then you can enjoy wireless high-fidelity music streaming Automatic Connection: When it is turned on next time this Bluetooth-compatible receiver will automatically connect to the last paired Bluetooth-compatible device. With Bluetooth-compatible antenna sound transmission is more stable noiseless more synchronous/low delay.