HIGH BLUETOOTH VERSION 5.0:FM transmitter use the high bluetooth 5.0 version not only provides stable connection and echo-cancellation reduces background noise for better hands-free calls. Upgrade cancels the ability to connect 2 phones. .7 COLOR LIGHTS SWITCH:Short press M to switch the color of the light at any time. Switching sequence red/orange/yellow/green/cyan/blue/purple/breathing light, you can get visually stunning display of colors. The best way to increase the ambient light in the car. .DUAL USB CHARGING PORT:Bluetooth transmitter can automatically identify the type of charging device,USB1 5V/2.4A,USB2 QC3.0 fast charging,obtain the maximum charging current 5V/3A and save charging time while protecting the charging phone. .3 MUSIC PLAY MODES:Bluetooth car kit can play the high quality musicMP3/WMA/WAV formats),Support Bluetooth input, TF card input, AUX input mode FM87.5-108MHZ full frequency point emission. .SUPPORT SIRI/GOOGLE ASSISTANTFM transmitter support triggers mobile phone voice assistant Siri/ Google to ensure safe driving.One-click voice assistant function to make phone calls, send texts or get driving directions.Enjoy the complete voice-control while you driving.If you have any questions, please contact us and we can provide satisfactory after-sales service. .